Moving StartWith tests.

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

@@ -484,47 +484,5 @@ namespace Tests
 
             await SequenceIdentity(xs);
         }
-
-        [Fact]
-        public void StartWith_Null()
-        {
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerableEx.StartWith(default(IAsyncEnumerable<int>), new[] { 1 }));
-            AssertThrows<ArgumentNullException>(() => AsyncEnumerableEx.StartWith(AsyncEnumerable.Return(42), null));
-        }
-
-        [Fact]
-        public void StartWith1()
-        {
-            var xs = AsyncEnumerable.Empty<int>().StartWith(1, 2);
-
-            var e = xs.GetAsyncEnumerator();
-            HasNext(e, 1);
-            HasNext(e, 2);
-            NoNext(e);
-        }
-
-        [Fact]
-        public void StartWith2()
-        {
-            var xs = AsyncEnumerable.Return<int>(0).StartWith(1, 2);
-
-            var e = xs.GetAsyncEnumerator();
-            HasNext(e, 1);
-            HasNext(e, 2);
-            HasNext(e, 0);
-            NoNext(e);
-        }
-
-        [Fact]
-        public void StartWith3()
-        {
-            var ex = new Exception("Bang!");
-            var xs = AsyncEnumerable.Throw<int>(ex).StartWith(1, 2);
-
-            var e = xs.GetAsyncEnumerator();
-            HasNext(e, 1);
-            HasNext(e, 2);
-            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
-        }
     }
 }

Ix.NET/Source/System.Interactive.Async.Tests/System/Linq/Operators/StartWith.cs

@@ -0,0 +1,56 @@
+// 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 Xunit;
+
+namespace Tests
+{
+    public class StartWith : AsyncEnumerableExTests
+    {
+        [Fact]
+        public void StartWith_Null()
+        {
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerableEx.StartWith(default(IAsyncEnumerable<int>), new[] { 1 }));
+            AssertThrows<ArgumentNullException>(() => AsyncEnumerableEx.StartWith(AsyncEnumerable.Return(42), null));
+        }
+
+        [Fact]
+        public void StartWith1()
+        {
+            var xs = AsyncEnumerable.Empty<int>().StartWith(1, 2);
+
+            var e = xs.GetAsyncEnumerator();
+            HasNext(e, 1);
+            HasNext(e, 2);
+            NoNext(e);
+        }
+
+        [Fact]
+        public void StartWith2()
+        {
+            var xs = AsyncEnumerable.Return<int>(0).StartWith(1, 2);
+
+            var e = xs.GetAsyncEnumerator();
+            HasNext(e, 1);
+            HasNext(e, 2);
+            HasNext(e, 0);
+            NoNext(e);
+        }
+
+        [Fact]
+        public void StartWith3()
+        {
+            var ex = new Exception("Bang!");
+            var xs = AsyncEnumerable.Throw<int>(ex).StartWith(1, 2);
+
+            var e = xs.GetAsyncEnumerator();
+            HasNext(e, 1);
+            HasNext(e, 2);
+            AssertThrows(() => e.MoveNextAsync().Wait(WaitTimeoutMs), (Exception ex_) => ((AggregateException)ex_).Flatten().InnerExceptions.Single() == ex);
+        }
+    }
+}