Fix space/tab issue

Ix.NET/Source/Tests/AsyncQueryableTests.Generated.cs

@@ -13,3367 +13,3367 @@ using Xunit;
 
 namespace Tests
 {
-	
-	public class AsyncQueryableTests
-	{
-		[Fact]
-		public void Aggregate1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "accumulator");
-
-			var res = AsyncQueryable.Aggregate<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Aggregate2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, int>>), CancellationToken.None), ane => ane.ParamName == "accumulator");
-
-			var res = AsyncQueryable.Aggregate<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Aggregate3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "accumulator");
-
-			var res = AsyncQueryable.Aggregate<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Aggregate4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>), CancellationToken.None), ane => ane.ParamName == "accumulator");
-
-			var res = AsyncQueryable.Aggregate<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Aggregate5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>), (int arg0) => default(int)), ane => ane.ParamName == "accumulator");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), default(Expression<Func<int, int>>)), ane => ane.ParamName == "resultSelector");
-
-			var res = AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Aggregate6()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "accumulator");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "resultSelector");
-
-			var res = AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void All1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.All<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.All<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.All<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void All2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.All<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.All<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.All<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Any1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Any2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Any3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Any4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<int?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<long>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<long?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<double>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average6()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<double?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average7()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<float>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average8()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<float?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average9()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<decimal>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average10()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<decimal?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average11()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average12()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<int?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average13()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<long>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average14()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<long?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average15()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<double>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average16()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<double?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average17()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<float>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average18()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<float?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average19()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average20()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<decimal?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Average(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average21()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average22()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average23()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(long)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average24()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average25()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(double)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average26()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average27()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(float)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average28()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average29()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average30()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average31()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average32()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average33()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(long), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average34()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average35()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(double), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average36()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average37()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(float), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average38()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average39()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Average40()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Buffer1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Buffer<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Buffer<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Buffer2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Buffer<int>(default(IAsyncQueryable<int>), 1, 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Buffer<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, 1);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Cast1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Cast<int>(default(IAsyncQueryable<object>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Cast<int>(new object[] { default(object) }.ToAsyncEnumerable().AsAsyncQueryable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Catch1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Catch<int, Exception>(default(IAsyncQueryable<int>), (Exception arg0) => new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Catch<int, Exception>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<Exception, IAsyncEnumerable<int>>>)), ane => ane.ParamName == "handler");
-
-			var res = AsyncQueryable.Catch<int, Exception>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (Exception arg0) => new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Catch2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Catch<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Catch<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
-
-			var res = AsyncQueryable.Catch<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Concat1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Concat<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Concat<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
-
-			var res = AsyncQueryable.Concat<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Contains1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Contains2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(default(IAsyncQueryable<int>), 1, CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Contains3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(default(IAsyncQueryable<int>), 1, EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, EqualityComparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Contains4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(default(IAsyncQueryable<int>), 1, EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, EqualityComparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Count1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Count2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Count3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Count4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void DefaultIfEmpty1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DefaultIfEmpty<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.DefaultIfEmpty<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void DefaultIfEmpty2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DefaultIfEmpty<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.DefaultIfEmpty<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Distinct1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Distinct<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Distinct2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Distinct3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int>(default(IAsyncQueryable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Distinct<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Distinct4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void DistinctUntilChanged1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.DistinctUntilChanged<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void DistinctUntilChanged2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int>(default(IAsyncQueryable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.DistinctUntilChanged<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void DistinctUntilChanged3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void DistinctUntilChanged4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Do1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), (int arg0) => Debug.WriteLine("")), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Action<int>>)), ane => ane.ParamName == "onNext");
-
-			var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Do2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), new NopObserver<int>()), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IObserver<int>)), ane => ane.ParamName == "observer");
-
-			var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new NopObserver<int>());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Do3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), (int arg0) => Debug.WriteLine(""), () => { }), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Action<int>>), () => { }), ane => ane.ParamName == "onNext");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), default(Action)), ane => ane.ParamName == "onCompleted");
-
-			var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), () => { });
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Do4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine("")), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Action<int>>), (Exception arg0) => Debug.WriteLine("")), ane => ane.ParamName == "onNext");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), default(Expression<Action<Exception>>)), ane => ane.ParamName == "onError");
-
-			var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine(""));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Do5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine(""), () => { }), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Action<int>>), (Exception arg0) => Debug.WriteLine(""), () => { }), ane => ane.ParamName == "onNext");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), default(Expression<Action<Exception>>), () => { }), ane => ane.ParamName == "onError");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine(""), default(Action)), ane => ane.ParamName == "onCompleted");
-
-			var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine(""), () => { });
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void ElementAt1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ElementAt<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.ElementAt<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ElementAt2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ElementAt<int>(default(IAsyncQueryable<int>), 1, CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.ElementAt<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ElementAtOrDefault1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ElementAtOrDefault<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.ElementAtOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ElementAtOrDefault2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ElementAtOrDefault<int>(default(IAsyncQueryable<int>), 1, CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.ElementAtOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Except1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
-
-			var res = AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Except2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "second");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Expand1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Expand<int>(default(IAsyncQueryable<int>), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Expand<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, IAsyncEnumerable<int>>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Expand<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable());
-			res = res.Take(5);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Finally1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Finally<int>(default(IAsyncQueryable<int>), () => { }), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Finally<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Action)), ane => ane.ParamName == "finallyAction");
-
-			var res = AsyncQueryable.Finally<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), () => { });
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void First1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void First2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void First3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void First4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void FirstOrDefault1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void FirstOrDefault2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void FirstOrDefault3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void FirstOrDefault4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void GroupBy1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupBy2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int)), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>)), ane => ane.ParamName == "elementSelector");
-
-			var res = AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupBy3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupBy4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>)), ane => ane.ParamName == "resultSelector");
-
-			var res = AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupBy5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "elementSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupBy6()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "elementSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>)), ane => ane.ParamName == "resultSelector");
-
-			var res = AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupBy7()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "resultSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupBy8()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "elementSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "resultSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupJoin1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "outer");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "inner");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "outerKeySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "innerKeySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>)), ane => ane.ParamName == "resultSelector");
-
-			var res = AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void GroupJoin2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "outer");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "inner");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "outerKeySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "innerKeySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "resultSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void IgnoreElements1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.IgnoreElements<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.IgnoreElements<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Intersect1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
-
-			var res = AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Intersect2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "second");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void IsEmpty1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.IsEmpty<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.IsEmpty<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void IsEmpty2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.IsEmpty<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.IsEmpty<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Join1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "outer");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "inner");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "outerKeySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "innerKeySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "resultSelector");
-
-			var res = AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Join2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "outer");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "inner");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "outerKeySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "innerKeySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "resultSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Last1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Last2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Last3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Last4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void LastOrDefault1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void LastOrDefault2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void LastOrDefault3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void LastOrDefault4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void LongCount1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void LongCount2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void LongCount3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void LongCount4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<long>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<double>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<float>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<decimal>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max6()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<int?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max7()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<long?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max8()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<double?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max9()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<float?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max10()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<decimal?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max11()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max12()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max13()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<long>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max14()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<double>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max15()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<float>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max16()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max17()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<int?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max18()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<long?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max19()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<double?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max20()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<float?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max21()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<decimal?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max22()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max23()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), Comparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), Comparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max24()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max25()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(long)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max26()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(double)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max27()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(float)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max28()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max29()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max30()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max31()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max32()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max33()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max34()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max35()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max36()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), Comparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max37()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max38()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(long), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max39()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(double), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max40()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(float), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max41()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max42()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max43()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max44()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max45()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Max46()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void MaxBy1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void MaxBy2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void MaxBy3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void MaxBy4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<long>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<double>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<float>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<decimal>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min6()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<int?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min7()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<long?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min8()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<double?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min9()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<float?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min10()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<decimal?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min11()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min12()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min13()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<long>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min14()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<double>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min15()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<float>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min16()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min17()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<int?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min18()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<long?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min19()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<double?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min20()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<float?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min21()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<decimal?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min22()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min23()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min24()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min25()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), Comparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), Comparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min26()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min27()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(long)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min28()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(double)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min29()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(float)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min30()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min31()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min32()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min33()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min34()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min35()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min36()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(long), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min37()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(double), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min38()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(float), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min39()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min40()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min41()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min42()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min43()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min44()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min45()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Min<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Min46()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), Comparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void MinBy1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void MinBy2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void MinBy3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void MinBy4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void OfType1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OfType<int>(default(IAsyncQueryable<object>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.OfType<int>(new object[] { default(object) }.ToAsyncEnumerable().AsAsyncQueryable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void OnErrorResumeNext1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OnErrorResumeNext<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OnErrorResumeNext<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
-
-			var res = AsyncQueryable.OnErrorResumeNext<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void OrderBy1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-		}
-
-		[Fact]
-		public void OrderBy2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default);
-		}
-
-		[Fact]
-		public void OrderByDescending1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-		}
-
-		[Fact]
-		public void OrderByDescending2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default);
-		}
-
-		[Fact]
-		public void Repeat1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Repeat<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Repeat<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			res = res.Take(5);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Repeat2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Repeat<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Repeat<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			res = res.Take(5);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Retry1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Retry<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Retry<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Retry2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Retry<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Retry<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Reverse1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Reverse<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Reverse<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Scan1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Scan<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Scan<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "accumulator");
-
-			var res = AsyncQueryable.Scan<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Scan2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Scan<int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Scan<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "accumulator");
-
-			var res = AsyncQueryable.Scan<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Select1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Select<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Select<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Select<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Select2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Select<int, int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Select<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Select<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SelectMany1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "other");
-
-			var res = AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SelectMany2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(default(IAsyncQueryable<int>), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, IAsyncEnumerable<int>>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SelectMany3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, IAsyncEnumerable<int>>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SelectMany4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, IAsyncEnumerable<int>>>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "selector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "resultSelector");
-
-			var res = AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SelectMany5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, IAsyncEnumerable<int>>>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "selector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "resultSelector");
-
-			var res = AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SequenceEqual1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
-
-			var res = AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void SequenceEqual2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), CancellationToken.None), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), CancellationToken.None), ane => ane.ParamName == "second");
-
-			var res = AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void SequenceEqual3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "second");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void SequenceEqual4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "second");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Single1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Single2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Single3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Single4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void SingleOrDefault1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void SingleOrDefault2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void SingleOrDefault3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void SingleOrDefault4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Skip1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Skip<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Skip<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SkipLast1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipLast<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.SkipLast<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SkipWhile1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipWhile<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.SkipWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void SkipWhile2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipWhile<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.SkipWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => true);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void StartWith1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.StartWith<int>(default(IAsyncQueryable<int>), new int[] { default(int) }), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.StartWith<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(int[])), ane => ane.ParamName == "values");
-
-			var res = AsyncQueryable.StartWith<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) });
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Sum1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<long>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<double>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<float>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<decimal>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum6()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<int?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum7()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<long?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum8()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<double?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum9()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<float?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum10()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<decimal?>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum11()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum12()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<long>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum13()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<double>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum14()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<float>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum15()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum16()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<int?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum17()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<long?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum18()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<double?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum19()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<float?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum20()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<decimal?>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Sum(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum21()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum22()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(long)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum23()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(double)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum24()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(float)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum25()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum26()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum27()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum28()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum29()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum30()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum31()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum32()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(long), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum33()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(double), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum34()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(float), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum35()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum36()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum37()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum38()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum39()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Sum40()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>), CancellationToken.None), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Take1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Take<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.Take<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void TakeLast1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeLast<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.TakeLast<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
-            var task = res.ForEachAsync(_ => { });
-            AssertEx.SucceedOrFailProper(() => task.Wait());
-        }
-
-		[Fact]
-		public void TakeWhile1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeWhile<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.TakeWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void TakeWhile2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeWhile<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.TakeWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => true);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void ThenBy1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(default(IOrderedAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int));
-		}
-
-		[Fact]
-		public void ThenBy2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(default(IOrderedAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int), Comparer<int>.Default);
-		}
-
-		[Fact]
-		public void ThenByDescending1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(default(IOrderedAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int));
-		}
-
-		[Fact]
-		public void ThenByDescending2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(default(IOrderedAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int), Comparer<int>.Default);
-		}
-
-		[Fact]
-		public void ToArray1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToArray<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.ToArray<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToArray2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToArray<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.ToArray<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToDictionary1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToDictionary2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToDictionary3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int)), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>)), ane => ane.ParamName == "elementSelector");
-
-			var res = AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToDictionary4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToDictionary5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "elementSelector");
-
-			var res = AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToDictionary6()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToDictionary7()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "elementSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToDictionary8()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "elementSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToList1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToList<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.ToList<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToList2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToList<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
-
-			var res = AsyncQueryable.ToList<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToLookup1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToLookup2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "keySelector");
-
-			var res = AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToLookup3()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int)), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int)), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>)), ane => ane.ParamName == "elementSelector");
-
-			var res = AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int));
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToLookup4()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToLookup5()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "elementSelector");
-
-			var res = AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToLookup6()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToLookup7()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "elementSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void ToLookup8()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "elementSelector");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None);
-			AssertEx.SucceedOrFailProper(() => res.Wait());
-		}
-
-		[Fact]
-		public void Union1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
-
-			var res = AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Union2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "second");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
-
-			var res = AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Where1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Where<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Where<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Where<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Where2()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Where<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => true), ane => ane.ParamName == "source");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Where<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, bool>>)), ane => ane.ParamName == "predicate");
-
-			var res = AsyncQueryable.Where<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => true);
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-		[Fact]
-		public void Zip1()
-		{
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Zip<int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "first");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Zip<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "second");
-			AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Zip<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "selector");
-
-			var res = AsyncQueryable.Zip<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int));
-			var task = res.ForEachAsync(_ => { });
-			AssertEx.SucceedOrFailProper(() => task.Wait());
-		}
-
-	}
+    
+    public class AsyncQueryableTests
+    {
+        [Fact]
+        public void Aggregate1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "accumulator");
+
+            var res = AsyncQueryable.Aggregate<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Aggregate2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, int>>), CancellationToken.None), ane => ane.ParamName == "accumulator");
+
+            var res = AsyncQueryable.Aggregate<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Aggregate3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "accumulator");
+
+            var res = AsyncQueryable.Aggregate<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Aggregate4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>), CancellationToken.None), ane => ane.ParamName == "accumulator");
+
+            var res = AsyncQueryable.Aggregate<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Aggregate5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>), (int arg0) => default(int)), ane => ane.ParamName == "accumulator");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), default(Expression<Func<int, int>>)), ane => ane.ParamName == "resultSelector");
+
+            var res = AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Aggregate6()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "accumulator");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "resultSelector");
+
+            var res = AsyncQueryable.Aggregate<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void All1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.All<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.All<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.All<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void All2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.All<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.All<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.All<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Any1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Any2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Any3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Any4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Any<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<int?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<long>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<long?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<double>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average6()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<double?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average7()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<float>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average8()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<float?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average9()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<decimal>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average10()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<decimal?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average11()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average12()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<int?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average13()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<long>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average14()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<long?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average15()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<double>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average16()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<double?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average17()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<float>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average18()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<float?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average19()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average20()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average(default(IAsyncQueryable<decimal?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Average(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average21()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average22()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average23()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(long)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average24()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average25()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(double)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average26()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average27()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(float)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average28()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average29()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average30()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average31()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average32()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average33()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(long), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average34()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average35()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(double), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average36()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average37()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(float), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average38()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average39()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Average40()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Average<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Buffer1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Buffer<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Buffer<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Buffer2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Buffer<int>(default(IAsyncQueryable<int>), 1, 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Buffer<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, 1);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Cast1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Cast<int>(default(IAsyncQueryable<object>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Cast<int>(new object[] { default(object) }.ToAsyncEnumerable().AsAsyncQueryable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Catch1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Catch<int, Exception>(default(IAsyncQueryable<int>), (Exception arg0) => new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Catch<int, Exception>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<Exception, IAsyncEnumerable<int>>>)), ane => ane.ParamName == "handler");
+
+            var res = AsyncQueryable.Catch<int, Exception>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (Exception arg0) => new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Catch2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Catch<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Catch<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
+
+            var res = AsyncQueryable.Catch<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Concat1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Concat<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Concat<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
+
+            var res = AsyncQueryable.Concat<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Contains1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Contains2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(default(IAsyncQueryable<int>), 1, CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Contains3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(default(IAsyncQueryable<int>), 1, EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, EqualityComparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Contains4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(default(IAsyncQueryable<int>), 1, EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Contains<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, EqualityComparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Count1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Count2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Count3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Count4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Count<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void DefaultIfEmpty1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DefaultIfEmpty<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.DefaultIfEmpty<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void DefaultIfEmpty2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DefaultIfEmpty<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.DefaultIfEmpty<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Distinct1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Distinct<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Distinct2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Distinct3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int>(default(IAsyncQueryable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Distinct<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Distinct4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Distinct<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void DistinctUntilChanged1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.DistinctUntilChanged<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void DistinctUntilChanged2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int>(default(IAsyncQueryable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.DistinctUntilChanged<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void DistinctUntilChanged3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void DistinctUntilChanged4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.DistinctUntilChanged<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Do1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), (int arg0) => Debug.WriteLine("")), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Action<int>>)), ane => ane.ParamName == "onNext");
+
+            var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Do2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), new NopObserver<int>()), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IObserver<int>)), ane => ane.ParamName == "observer");
+
+            var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new NopObserver<int>());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Do3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), (int arg0) => Debug.WriteLine(""), () => { }), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Action<int>>), () => { }), ane => ane.ParamName == "onNext");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), default(Action)), ane => ane.ParamName == "onCompleted");
+
+            var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), () => { });
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Do4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine("")), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Action<int>>), (Exception arg0) => Debug.WriteLine("")), ane => ane.ParamName == "onNext");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), default(Expression<Action<Exception>>)), ane => ane.ParamName == "onError");
+
+            var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine(""));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Do5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(default(IAsyncQueryable<int>), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine(""), () => { }), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Action<int>>), (Exception arg0) => Debug.WriteLine(""), () => { }), ane => ane.ParamName == "onNext");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), default(Expression<Action<Exception>>), () => { }), ane => ane.ParamName == "onError");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine(""), default(Action)), ane => ane.ParamName == "onCompleted");
+
+            var res = AsyncQueryable.Do<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => Debug.WriteLine(""), (Exception arg0) => Debug.WriteLine(""), () => { });
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void ElementAt1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ElementAt<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.ElementAt<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ElementAt2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ElementAt<int>(default(IAsyncQueryable<int>), 1, CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.ElementAt<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ElementAtOrDefault1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ElementAtOrDefault<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.ElementAtOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ElementAtOrDefault2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ElementAtOrDefault<int>(default(IAsyncQueryable<int>), 1, CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.ElementAtOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Except1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
+
+            var res = AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Except2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "second");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Except<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Expand1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Expand<int>(default(IAsyncQueryable<int>), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Expand<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, IAsyncEnumerable<int>>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Expand<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable());
+            res = res.Take(5);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Finally1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Finally<int>(default(IAsyncQueryable<int>), () => { }), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Finally<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Action)), ane => ane.ParamName == "finallyAction");
+
+            var res = AsyncQueryable.Finally<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), () => { });
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void First1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void First2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void First3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void First4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.First<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void FirstOrDefault1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void FirstOrDefault2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void FirstOrDefault3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void FirstOrDefault4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.FirstOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void GroupBy1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupBy2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int)), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>)), ane => ane.ParamName == "elementSelector");
+
+            var res = AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupBy3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.GroupBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupBy4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>)), ane => ane.ParamName == "resultSelector");
+
+            var res = AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupBy5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "elementSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupBy6()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "elementSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>)), ane => ane.ParamName == "resultSelector");
+
+            var res = AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupBy7()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "resultSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.GroupBy<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupBy8()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "elementSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "resultSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.GroupBy<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupJoin1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "outer");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "inner");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "outerKeySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int)), ane => ane.ParamName == "innerKeySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>)), ane => ane.ParamName == "resultSelector");
+
+            var res = AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void GroupJoin2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "outer");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "inner");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "outerKeySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "innerKeySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, IAsyncEnumerable<int>, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "resultSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.GroupJoin<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, IAsyncEnumerable<int> arg1) => default(int), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void IgnoreElements1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.IgnoreElements<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.IgnoreElements<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Intersect1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
+
+            var res = AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Intersect2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "second");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Intersect<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void IsEmpty1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.IsEmpty<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.IsEmpty<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void IsEmpty2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.IsEmpty<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.IsEmpty<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Join1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "outer");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "inner");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "outerKeySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "innerKeySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "resultSelector");
+
+            var res = AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Join2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "outer");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "inner");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int>>), (int arg0) => default(int), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "outerKeySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), default(Expression<Func<int, int>>), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "innerKeySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), default(Expression<Func<int, int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "resultSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Join<int, int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0) => default(int), (int arg0) => default(int), (int arg0, int arg1) => default(int), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Last1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Last2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Last3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Last4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Last<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void LastOrDefault1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void LastOrDefault2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void LastOrDefault3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void LastOrDefault4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.LastOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void LongCount1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void LongCount2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void LongCount3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void LongCount4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.LongCount<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<long>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<double>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<float>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<decimal>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max6()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<int?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max7()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<long?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max8()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<double?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max9()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<float?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max10()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<decimal?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max11()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max12()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max13()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<long>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max14()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<double>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max15()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<float>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max16()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max17()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<int?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max18()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<long?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max19()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<double?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max20()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<float?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max21()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max(default(IAsyncQueryable<decimal?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max22()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max23()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), Comparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), Comparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max24()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max25()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(long)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max26()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(double)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max27()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(float)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max28()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max29()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max30()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max31()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max32()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max33()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max34()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max35()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max36()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), Comparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max37()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max38()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(long), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max39()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(double), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max40()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(float), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max41()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max42()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max43()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max44()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max45()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Max46()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Max<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void MaxBy1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void MaxBy2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void MaxBy3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void MaxBy4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.MaxBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<long>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<double>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<float>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<decimal>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min6()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<int?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min7()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<long?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min8()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<double?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min9()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<float?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min10()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<decimal?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min11()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min12()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min13()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<long>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min14()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<double>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min15()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<float>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min16()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min17()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<int?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min18()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<long?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min19()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<double?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min20()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<float?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min21()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min(default(IAsyncQueryable<decimal?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min22()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min23()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min24()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min25()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), Comparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), Comparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min26()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min27()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(long)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min28()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(double)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min29()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(float)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min30()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min31()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min32()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min33()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min34()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min35()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min36()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(long), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min37()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(double), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min38()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(float), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min39()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min40()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min41()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min42()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min43()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min44()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min45()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Min<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Min46()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(default(IAsyncQueryable<int>), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Min<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), Comparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void MinBy1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void MinBy2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void MinBy3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void MinBy4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.MinBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void OfType1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OfType<int>(default(IAsyncQueryable<object>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.OfType<int>(new object[] { default(object) }.ToAsyncEnumerable().AsAsyncQueryable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void OnErrorResumeNext1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OnErrorResumeNext<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OnErrorResumeNext<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
+
+            var res = AsyncQueryable.OnErrorResumeNext<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void OrderBy1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+        }
+
+        [Fact]
+        public void OrderBy2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.OrderBy<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default);
+        }
+
+        [Fact]
+        public void OrderByDescending1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+        }
+
+        [Fact]
+        public void OrderByDescending2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.OrderByDescending<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), Comparer<int>.Default);
+        }
+
+        [Fact]
+        public void Repeat1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Repeat<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Repeat<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            res = res.Take(5);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Repeat2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Repeat<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Repeat<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            res = res.Take(5);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Retry1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Retry<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Retry<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Retry2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Retry<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Retry<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Reverse1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Reverse<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Reverse<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Scan1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Scan<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Scan<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "accumulator");
+
+            var res = AsyncQueryable.Scan<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Scan2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Scan<int, int>(default(IAsyncQueryable<int>), 1, (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Scan<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "accumulator");
+
+            var res = AsyncQueryable.Scan<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1, (int arg0, int arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Select1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Select<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Select<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Select<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Select2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Select<int, int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Select<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Select<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SelectMany1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "other");
+
+            var res = AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SelectMany2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(default(IAsyncQueryable<int>), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, IAsyncEnumerable<int>>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SelectMany3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, IAsyncEnumerable<int>>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.SelectMany<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SelectMany4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, IAsyncEnumerable<int>>>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "selector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "resultSelector");
+
+            var res = AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SelectMany5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, IAsyncEnumerable<int>>>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "selector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "resultSelector");
+
+            var res = AsyncQueryable.SelectMany<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SequenceEqual1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
+
+            var res = AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void SequenceEqual2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), CancellationToken.None), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), CancellationToken.None), ane => ane.ParamName == "second");
+
+            var res = AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void SequenceEqual3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "second");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void SequenceEqual4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "second");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.SequenceEqual<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Single1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Single2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Single3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Single4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Single<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void SingleOrDefault1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void SingleOrDefault2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void SingleOrDefault3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void SingleOrDefault4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(default(IAsyncQueryable<int>), (int arg0) => true, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>), CancellationToken.None), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.SingleOrDefault<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Skip1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Skip<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Skip<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SkipLast1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipLast<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.SkipLast<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SkipWhile1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipWhile<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.SkipWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void SkipWhile2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipWhile<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.SkipWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.SkipWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => true);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void StartWith1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.StartWith<int>(default(IAsyncQueryable<int>), new int[] { default(int) }), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.StartWith<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(int[])), ane => ane.ParamName == "values");
+
+            var res = AsyncQueryable.StartWith<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) });
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Sum1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<long>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<double>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<float>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<decimal>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum6()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<int?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum7()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<long?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum8()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<double?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum9()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<float?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum10()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<decimal?>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum11()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum12()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<long>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new long[] { default(long) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum13()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<double>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new double[] { default(double) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum14()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<float>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new float[] { default(float) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum15()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new decimal[] { default(decimal) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum16()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<int?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new int?[] { default(int?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum17()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<long?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new long?[] { default(long?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum18()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<double?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new double?[] { default(double?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum19()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<float?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new float?[] { default(float?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum20()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum(default(IAsyncQueryable<decimal?>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Sum(new decimal?[] { default(decimal?) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum21()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum22()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(long)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum23()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(double)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum24()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(float)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum25()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum26()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum27()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum28()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum29()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum30()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum31()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum32()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(long), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(long), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum33()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(double), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(double), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum34()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(float), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(float), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum35()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(decimal), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(decimal), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum36()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<int>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum37()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<long>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, long?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<long>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum38()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<double>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, double?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<double>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum39()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<float>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, float?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<float>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Sum40()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(default(IAsyncQueryable<int>), (int arg0) => default(Nullable<decimal>), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, decimal?>>), CancellationToken.None), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Sum<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(Nullable<decimal>), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Take1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Take<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.Take<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void TakeLast1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeLast<int>(default(IAsyncQueryable<int>), 1), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.TakeLast<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), 1);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void TakeWhile1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeWhile<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.TakeWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void TakeWhile2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeWhile<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.TakeWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.TakeWhile<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => true);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void ThenBy1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(default(IOrderedAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int));
+        }
+
+        [Fact]
+        public void ThenBy2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(default(IOrderedAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ThenBy<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int), Comparer<int>.Default);
+        }
+
+        [Fact]
+        public void ThenByDescending1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(default(IOrderedAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int));
+        }
+
+        [Fact]
+        public void ThenByDescending2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(default(IOrderedAsyncQueryable<int>), (int arg0) => default(int), Comparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), default(Expression<Func<int, int>>), Comparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int), default(IComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ThenByDescending<int, int>(new int[0].ToAsyncEnumerable().AsAsyncQueryable().OrderBy(x => x), (int arg0) => default(int), Comparer<int>.Default);
+        }
+
+        [Fact]
+        public void ToArray1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToArray<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.ToArray<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToArray2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToArray<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.ToArray<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToDictionary1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToDictionary2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToDictionary3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int)), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>)), ane => ane.ParamName == "elementSelector");
+
+            var res = AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToDictionary4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToDictionary5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "elementSelector");
+
+            var res = AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToDictionary6()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ToDictionary<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToDictionary7()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "elementSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToDictionary8()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "elementSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ToDictionary<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToList1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToList<int>(default(IAsyncQueryable<int>)), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.ToList<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable());
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToList2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToList<int>(default(IAsyncQueryable<int>), CancellationToken.None), ane => ane.ParamName == "source");
+
+            var res = AsyncQueryable.ToList<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToLookup1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>)), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToLookup2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "keySelector");
+
+            var res = AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToLookup3()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int)), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int)), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>)), ane => ane.ParamName == "elementSelector");
+
+            var res = AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int));
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToLookup4()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToLookup5()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), CancellationToken.None), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), CancellationToken.None), ane => ane.ParamName == "elementSelector");
+
+            var res = AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToLookup6()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ToLookup<int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToLookup7()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default), ane => ane.ParamName == "elementSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void ToLookup8()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(default(IAsyncQueryable<int>), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int>>), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "keySelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), default(Expression<Func<int, int>>), EqualityComparer<int>.Default, CancellationToken.None), ane => ane.ParamName == "elementSelector");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), default(IEqualityComparer<int>), CancellationToken.None), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.ToLookup<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => default(int), (int arg0) => default(int), EqualityComparer<int>.Default, CancellationToken.None);
+            AssertEx.SucceedOrFailProper(() => res.Wait());
+        }
+
+        [Fact]
+        public void Union1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable()), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>)), ane => ane.ParamName == "second");
+
+            var res = AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable());
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Union2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), EqualityComparer<int>.Default), ane => ane.ParamName == "second");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(IEqualityComparer<int>)), ane => ane.ParamName == "comparer");
+
+            var res = AsyncQueryable.Union<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), EqualityComparer<int>.Default);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Where1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Where<int>(default(IAsyncQueryable<int>), (int arg0) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Where<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Where<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0) => true);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Where2()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Where<int>(default(IAsyncQueryable<int>), (int arg0, int arg1) => true), ane => ane.ParamName == "source");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Where<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(Expression<Func<int, int, bool>>)), ane => ane.ParamName == "predicate");
+
+            var res = AsyncQueryable.Where<int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), (int arg0, int arg1) => true);
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+        [Fact]
+        public void Zip1()
+        {
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Zip<int, int, int>(default(IAsyncQueryable<int>), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "first");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Zip<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), default(IAsyncEnumerable<int>), (int arg0, int arg1) => default(int)), ane => ane.ParamName == "second");
+            AssertEx.Throws<ArgumentNullException>(() => AsyncQueryable.Zip<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), default(Expression<Func<int, int, int>>)), ane => ane.ParamName == "selector");
+
+            var res = AsyncQueryable.Zip<int, int, int>(new int[] { default(int) }.ToAsyncEnumerable().AsAsyncQueryable(), new int[] { default(int) }.ToAsyncEnumerable(), (int arg0, int arg1) => default(int));
+            var task = res.ForEachAsync(_ => { });
+            AssertEx.SucceedOrFailProper(() => task.Wait());
+        }
+
+    }
 }