Moving SelectMany tests to a separate file.

Ix.NET/Source/System.Interactive.Async.Tests/AsyncTests.Single.cs

@@ -58,263 +58,6 @@ namespace Tests
             NoNext(e);
         }
 
-        [Fact]
-        public void SelectMany_Null()
-        {
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int>(null, default(Func<int, IAsyncEnumerable<int>>)));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int>(null, default(Func<int, int, IAsyncEnumerable<int>>)));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int>(AsyncEnumerable.Return(42), default(Func<int, IAsyncEnumerable<int>>)));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int>(AsyncEnumerable.Return(42), default(Func<int, int, IAsyncEnumerable<int>>)));
-
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(null, default(Func<int, IAsyncEnumerable<int>>), (x, y) => x));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(null, default(Func<int, int, IAsyncEnumerable<int>>), (x, y) => x));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(AsyncEnumerable.Return(42), default(Func<int, IAsyncEnumerable<int>>), (x, y) => x));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(AsyncEnumerable.Return(42), default(Func<int, int, IAsyncEnumerable<int>>), (x, y) => x));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(AsyncEnumerable.Return(42), x => null, default(Func<int, int, int>)));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(AsyncEnumerable.Return(42), (x, i) => null, default(Func<int, int, int>)));
-        }
-
-        [Fact]
-        public void SelectMany1()
-        {
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany(x => Enumerable.Range(0, x).ToAsyncEnumerable());
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 0);
-            HasNext(e, 0);
-            HasNext(e, 1);
-            HasNext(e, 0);
-            HasNext(e, 1);
-            HasNext(e, 2);
-            NoNext(e);
-        }
-
-        [Fact]
-        public void SelectMany2()
-        {
-            var ex = new Exception("Bang");
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany(x =>
-            {
-                if (x < 3)
-                    return Enumerable.Range(0, x).ToAsyncEnumerable();
-                else
-                    return AsyncEnumerable.Throw<int>(ex);
-            });
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 0);
-            HasNext(e, 0);
-            HasNext(e, 1);
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
-
-        [Fact]
-        public void SelectMany3()
-        {
-            var ex = new Exception("Bang");
-            var xs = AsyncEnumerable.Throw<int>(ex);
-            var ys = xs.SelectMany(x => Enumerable.Range(0, x).ToAsyncEnumerable());
-
-            var e = ys.GetAsyncEnumerator();
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
-
-        [Fact]
-        public void SelectMany4()
-        {
-            var ex = new Exception("Bang");
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany(x =>
-            {
-                if (x < 3)
-                    return Enumerable.Range(0, x).ToAsyncEnumerable();
-                else
-                    throw ex;
-            });
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 0);
-            HasNext(e, 0);
-            HasNext(e, 1);
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
-
-        [Fact]
-        public void SelectMany5()
-        {
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 5, x).ToAsyncEnumerable());
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 5);
-            HasNext(e, 6);
-            HasNext(e, 7);
-            HasNext(e, 7);
-            HasNext(e, 8);
-            HasNext(e, 9);
-            NoNext(e);
-        }
-
-        [Fact]
-        public void SelectMany6()
-        {
-            var ex = new Exception("Bang");
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany((x, i) =>
-            {
-                if (i < 2)
-                    return Enumerable.Range(0, x).ToAsyncEnumerable();
-                else
-                    return AsyncEnumerable.Throw<int>(ex);
-            });
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 0);
-            HasNext(e, 0);
-            HasNext(e, 1);
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
-
-        [Fact]
-        public void SelectMany7()
-        {
-            var ex = new Exception("Bang");
-            var xs = AsyncEnumerable.Throw<int>(ex);
-            var ys = xs.SelectMany((x, i) => Enumerable.Range(0, x).ToAsyncEnumerable());
-
-            var e = ys.GetAsyncEnumerator();
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
-
-        [Fact]
-        public void SelectMany8()
-        {
-            var ex = new Exception("Bang");
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany((x, i) =>
-            {
-                if (i < 2)
-                    return Enumerable.Range(0, x).ToAsyncEnumerable();
-                else
-                    throw ex;
-            });
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 0);
-            HasNext(e, 0);
-            HasNext(e, 1);
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
-
-        [Fact]
-        public void SelectMany9()
-        {
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany(x => Enumerable.Range(3, x).ToAsyncEnumerable(), (x, y) => x * y);
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 3);
-            HasNext(e, 6);
-            HasNext(e, 8);
-            HasNext(e, 9);
-            HasNext(e, 12);
-            HasNext(e, 15);
-            NoNext(e);
-        }
-
-        [Fact]
-        public void SelectMany10()
-        {
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 3, x).ToAsyncEnumerable(), (x, y) => x * y);
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 3);
-            HasNext(e, 8);
-            HasNext(e, 10);
-            HasNext(e, 15);
-            HasNext(e, 18);
-            HasNext(e, 21);
-            NoNext(e);
-        }
-
-        [Fact]
-        public void SelectMany11()
-        {
-            var ex = new Exception("Bang");
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany(x => Enumerable.Range(3, x).ToAsyncEnumerable(), (x, y) =>
-            {
-                if (x * y > 10)
-                    throw ex;
-                return x * y;
-            });
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 3);
-            HasNext(e, 6);
-            HasNext(e, 8);
-            HasNext(e, 9);
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
-
-        [Fact]
-        public void SelectMany12()
-        {
-            var ex = new Exception("Bang");
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 3, x).ToAsyncEnumerable(), (x, y) =>
-            {
-                if (x * y > 10)
-                    throw ex;
-                return x * y;
-            });
-
-            var e = ys.GetAsyncEnumerator();
-            HasNext(e, 3);
-            HasNext(e, 8);
-            HasNext(e, 10);
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
-
-        [Fact]
-        public async Task SelectMany13()
-        {
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany(x => Enumerable.Range(0, x).ToAsyncEnumerable());
-
-            await SequenceIdentity(ys);
-        }
-
-        [Fact]
-        public async Task SelectMany14()
-        {
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 5, x).ToAsyncEnumerable());
-
-            await SequenceIdentity(ys);
-        }
-
-        [Fact]
-        public async Task SelectMany15()
-        {
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany(x => Enumerable.Range(3, x).ToAsyncEnumerable(), (x, y) => x * y);
-
-            await SequenceIdentity(ys);
-        }
-
-        [Fact]
-        public async Task SelectMany16()
-        {
-            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
-            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 3, x).ToAsyncEnumerable(), (x, y) => x * y);
-
-            await SequenceIdentity(ys);
-        }
-
         [Fact]
         public void Do_Null()
         {

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

@@ -0,0 +1,272 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information. 
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace Tests
+{
+    public class SelectMany : AsyncEnumerableTests
+    {
+        [Fact]
+        public void SelectMany_Null()
+        {
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int>(null, default(Func<int, IAsyncEnumerable<int>>)));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int>(null, default(Func<int, int, IAsyncEnumerable<int>>)));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int>(AsyncEnumerable.Return(42), default(Func<int, IAsyncEnumerable<int>>)));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int>(AsyncEnumerable.Return(42), default(Func<int, int, IAsyncEnumerable<int>>)));
+
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(null, default(Func<int, IAsyncEnumerable<int>>), (x, y) => x));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(null, default(Func<int, int, IAsyncEnumerable<int>>), (x, y) => x));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(AsyncEnumerable.Return(42), default(Func<int, IAsyncEnumerable<int>>), (x, y) => x));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(AsyncEnumerable.Return(42), default(Func<int, int, IAsyncEnumerable<int>>), (x, y) => x));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(AsyncEnumerable.Return(42), x => null, default(Func<int, int, int>)));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerable.SelectMany<int, int, int>(AsyncEnumerable.Return(42), (x, i) => null, default(Func<int, int, int>)));
+        }
+
+        [Fact]
+        public void SelectMany1()
+        {
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany(x => Enumerable.Range(0, x).ToAsyncEnumerable());
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 0);
+            HasNext(e, 0);
+            HasNext(e, 1);
+            HasNext(e, 0);
+            HasNext(e, 1);
+            HasNext(e, 2);
+            NoNext(e);
+        }
+
+        [Fact]
+        public void SelectMany2()
+        {
+            var ex = new Exception("Bang");
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany(x =>
+            {
+                if (x < 3)
+                    return Enumerable.Range(0, x).ToAsyncEnumerable();
+                else
+                    return AsyncEnumerable.Throw<int>(ex);
+            });
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 0);
+            HasNext(e, 0);
+            HasNext(e, 1);
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+
+        [Fact]
+        public void SelectMany3()
+        {
+            var ex = new Exception("Bang");
+            var xs = AsyncEnumerable.Throw<int>(ex);
+            var ys = xs.SelectMany(x => Enumerable.Range(0, x).ToAsyncEnumerable());
+
+            var e = ys.GetAsyncEnumerator();
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+
+        [Fact]
+        public void SelectMany4()
+        {
+            var ex = new Exception("Bang");
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany(x =>
+            {
+                if (x < 3)
+                    return Enumerable.Range(0, x).ToAsyncEnumerable();
+                else
+                    throw ex;
+            });
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 0);
+            HasNext(e, 0);
+            HasNext(e, 1);
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+
+        [Fact]
+        public void SelectMany5()
+        {
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 5, x).ToAsyncEnumerable());
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 5);
+            HasNext(e, 6);
+            HasNext(e, 7);
+            HasNext(e, 7);
+            HasNext(e, 8);
+            HasNext(e, 9);
+            NoNext(e);
+        }
+
+        [Fact]
+        public void SelectMany6()
+        {
+            var ex = new Exception("Bang");
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany((x, i) =>
+            {
+                if (i < 2)
+                    return Enumerable.Range(0, x).ToAsyncEnumerable();
+                else
+                    return AsyncEnumerable.Throw<int>(ex);
+            });
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 0);
+            HasNext(e, 0);
+            HasNext(e, 1);
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+
+        [Fact]
+        public void SelectMany7()
+        {
+            var ex = new Exception("Bang");
+            var xs = AsyncEnumerable.Throw<int>(ex);
+            var ys = xs.SelectMany((x, i) => Enumerable.Range(0, x).ToAsyncEnumerable());
+
+            var e = ys.GetAsyncEnumerator();
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+
+        [Fact]
+        public void SelectMany8()
+        {
+            var ex = new Exception("Bang");
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany((x, i) =>
+            {
+                if (i < 2)
+                    return Enumerable.Range(0, x).ToAsyncEnumerable();
+                else
+                    throw ex;
+            });
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 0);
+            HasNext(e, 0);
+            HasNext(e, 1);
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+
+        [Fact]
+        public void SelectMany9()
+        {
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany(x => Enumerable.Range(3, x).ToAsyncEnumerable(), (x, y) => x * y);
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 3);
+            HasNext(e, 6);
+            HasNext(e, 8);
+            HasNext(e, 9);
+            HasNext(e, 12);
+            HasNext(e, 15);
+            NoNext(e);
+        }
+
+        [Fact]
+        public void SelectMany10()
+        {
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 3, x).ToAsyncEnumerable(), (x, y) => x * y);
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 3);
+            HasNext(e, 8);
+            HasNext(e, 10);
+            HasNext(e, 15);
+            HasNext(e, 18);
+            HasNext(e, 21);
+            NoNext(e);
+        }
+
+        [Fact]
+        public void SelectMany11()
+        {
+            var ex = new Exception("Bang");
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany(x => Enumerable.Range(3, x).ToAsyncEnumerable(), (x, y) =>
+            {
+                if (x * y > 10)
+                    throw ex;
+                return x * y;
+            });
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 3);
+            HasNext(e, 6);
+            HasNext(e, 8);
+            HasNext(e, 9);
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+
+        [Fact]
+        public void SelectMany12()
+        {
+            var ex = new Exception("Bang");
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 3, x).ToAsyncEnumerable(), (x, y) =>
+            {
+                if (x * y > 10)
+                    throw ex;
+                return x * y;
+            });
+
+            var e = ys.GetAsyncEnumerator();
+            HasNext(e, 3);
+            HasNext(e, 8);
+            HasNext(e, 10);
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+
+        [Fact]
+        public async Task SelectMany13()
+        {
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany(x => Enumerable.Range(0, x).ToAsyncEnumerable());
+
+            await SequenceIdentity(ys);
+        }
+
+        [Fact]
+        public async Task SelectMany14()
+        {
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 5, x).ToAsyncEnumerable());
+
+            await SequenceIdentity(ys);
+        }
+
+        [Fact]
+        public async Task SelectMany15()
+        {
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany(x => Enumerable.Range(3, x).ToAsyncEnumerable(), (x, y) => x * y);
+
+            await SequenceIdentity(ys);
+        }
+
+        [Fact]
+        public async Task SelectMany16()
+        {
+            var xs = new[] { 1, 2, 3 }.ToAsyncEnumerable();
+            var ys = xs.SelectMany((x, i) => Enumerable.Range(i + 3, x).ToAsyncEnumerable(), (x, y) => x * y);
+
+            await SequenceIdentity(ys);
+        }
+    }
+}