Misc. tests.

Ix.NET/Source/System.Linq.Async.Tests/System/Linq/Operators/All.cs

@@ -20,6 +20,12 @@ namespace Tests
 
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AllAsync<int>(default, x => true, CancellationToken.None));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AllAsync(Return42, default(Func<int, bool>), CancellationToken.None));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AllAsync<int>(default, x => new ValueTask<bool>(true)));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AllAsync(Return42, default(Func<int, ValueTask<bool>>)));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AllAsync<int>(default, x => new ValueTask<bool>(true), CancellationToken.None));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AllAsync(Return42, default(Func<int, ValueTask<bool>>), CancellationToken.None));
         }
 
         [Fact]
@@ -51,5 +57,35 @@ namespace Tests
             var res = new[] { 2, 8, 4 }.ToAsyncEnumerable().AllAsync(new Func<int, bool>(x => { throw ex; }));
             await AssertThrowsAsync(res, ex);
         }
+
+        [Fact]
+        public async Task All5Async()
+        {
+            var res = new[] { 1, 2, 3, 4 }.ToAsyncEnumerable().AllAsync(x => new ValueTask<bool>(x % 2 == 0));
+            Assert.False(await res);
+        }
+
+        [Fact]
+        public async Task All6Async()
+        {
+            var res = new[] { 2, 8, 4 }.ToAsyncEnumerable().AllAsync(x => new ValueTask<bool>(x % 2 == 0));
+            Assert.True(await res);
+        }
+
+        [Fact]
+        public async Task All7Async()
+        {
+            var ex = new Exception("Bang!");
+            var res = Throw<int>(ex).AllAsync(x => new ValueTask<bool>(x % 2 == 0));
+            await AssertThrowsAsync(res, ex);
+        }
+
+        [Fact]
+        public async Task All8Async()
+        {
+            var ex = new Exception("Bang!");
+            var res = new[] { 2, 8, 4 }.ToAsyncEnumerable().AllAsync(new Func<int, ValueTask<bool>>(x => { throw ex; }));
+            await AssertThrowsAsync(res, ex);
+        }
     }
 }

Ix.NET/Source/System.Linq.Async.Tests/System/Linq/Operators/Any.cs

@@ -16,12 +16,19 @@ namespace Tests
         public async Task Any_Null()
         {
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync<int>(default));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync<int>(default, CancellationToken.None));
+
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync<int>(default, x => true));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync(Return42, default(Func<int, bool>)));
 
-            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync<int>(default, CancellationToken.None));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync<int>(default, x => true, CancellationToken.None));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync(Return42, default(Func<int, bool>), CancellationToken.None));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync<int>(default, x => new ValueTask<bool>(true)));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync(Return42, default(Func<int, ValueTask<bool>>)));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync<int>(default, x => new ValueTask<bool>(true), CancellationToken.None));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.AnyAsync(Return42, default(Func<int, ValueTask<bool>>), CancellationToken.None));
         }
 
         [Fact]
@@ -67,5 +74,35 @@ namespace Tests
             var res = new int[0].ToAsyncEnumerable().AnyAsync();
             Assert.False(await res);
         }
+
+        [Fact]
+        public async Task Any7Async()
+        {
+            var res = new[] { 1, 2, 3, 4 }.ToAsyncEnumerable().AnyAsync(x => new ValueTask<bool>(x % 2 == 0));
+            Assert.True(await res);
+        }
+
+        [Fact]
+        public async Task Any8Async()
+        {
+            var res = new[] { 2, 8, 4 }.ToAsyncEnumerable().AnyAsync(x => new ValueTask<bool>(x % 2 != 0));
+            Assert.False(await res);
+        }
+
+        [Fact]
+        public async Task Any9Async()
+        {
+            var ex = new Exception("Bang!");
+            var res = Throw<int>(ex).AnyAsync(x => new ValueTask<bool>(x % 2 == 0));
+            await AssertThrowsAsync(res, ex);
+        }
+
+        [Fact]
+        public async Task Any10Async()
+        {
+            var ex = new Exception("Bang!");
+            var res = new[] { 2, 8, 4 }.ToAsyncEnumerable().AnyAsync(new Func<int, ValueTask<bool>>(x => { throw ex; }));
+            await AssertThrowsAsync(res, ex);
+        }
     }
 }

Ix.NET/Source/System.Linq.Async.Tests/System/Linq/Operators/Single.cs

@@ -16,12 +16,25 @@ namespace Tests
         public async Task Single_Null()
         {
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync<int>(default));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync<int>(default, CancellationToken.None));
+
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync<int>(default, x => true));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync(Return42, default(Func<int, bool>)));
 
-            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync<int>(default, CancellationToken.None));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync<int>(default, x => true, CancellationToken.None));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync(Return42, default(Func<int, bool>), CancellationToken.None));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync<int>(default, x => new ValueTask<bool>(true)));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync(Return42, default(Func<int, ValueTask<bool>>)));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync<int>(default, x => new ValueTask<bool>(true), CancellationToken.None));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync(Return42, default(Func<int, ValueTask<bool>>), CancellationToken.None));
+
+#if !NO_DEEP_CANCELLATION
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync<int>(default, (x, ct) => new ValueTask<bool>(true), CancellationToken.None));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleAsync(Return42, default(Func<int, CancellationToken, ValueTask<bool>>), CancellationToken.None));
+#endif
         }
 
         [Fact]

Ix.NET/Source/System.Linq.Async.Tests/System/Linq/Operators/SingleOrDefault.cs

@@ -16,12 +16,25 @@ namespace Tests
         public async Task SingleOrDefault_Null()
         {
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync<int>(default));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync<int>(default, CancellationToken.None));
+
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync<int>(default, x => true));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync(Return42, default(Func<int, bool>)));
 
-            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync<int>(default, CancellationToken.None));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync<int>(default, x => true, CancellationToken.None));
             await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync(Return42, default(Func<int, bool>), CancellationToken.None));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync<int>(default, x => new ValueTask<bool>(true)));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync(Return42, default(Func<int, ValueTask<bool>>)));
+
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync<int>(default, x => new ValueTask<bool>(true), CancellationToken.None));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync(Return42, default(Func<int, ValueTask<bool>>), CancellationToken.None));
+
+#if !NO_DEEP_CANCELLATION
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync<int>(default, (x, ct) => new ValueTask<bool>(true), CancellationToken.None));
+            await Assert.ThrowsAsync<ArgumentNullException>(() => AsyncEnumerable.SingleOrDefaultAsync(Return42, default(Func<int, CancellationToken, ValueTask<bool>>), CancellationToken.None));
+#endif
         }
 
         [Fact]