Merge pull request #3796 from ntherning/windows-backend-for-MemoryMappedFile

[mono.git] / mcs / class / corlib / Test / System.Runtime.CompilerServices / TaskAwaiterTest.cs

diff --git a/mcs/class/corlib/Test/System.Runtime.CompilerServices/TaskAwaiterTest.cs b/mcs/class/corlib/Test/System.Runtime.CompilerServices/TaskAwaiterTest.cs
index 1bc9d38414758f89d626e21e369236701da04839..6a6ecc0b36d66e4bb24febc722b64536c5935179 100644 (file)
--- a/mcs/class/corlib/Test/System.Runtime.CompilerServices/TaskAwaiterTest.cs
+++ b/mcs/class/corlib/Test/System.Runtime.CompilerServices/TaskAwaiterTest.cs
@@ -26,7 +26,6 @@
 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //
 
-#if NET_4_5
 
 using System;
 using System.Threading;
@@ -35,6 +34,7 @@ using NUnit.Framework;
 using System.Runtime.CompilerServices;
 using System.Collections.Generic;
 using System.Collections;
+using System.Collections.Concurrent;
 
 namespace MonoTests.System.Runtime.CompilerServices
 {
@@ -106,6 +106,43 @@ namespace MonoTests.System.Runtime.CompilerServices
                        }
                }
 
+               class NestedSynchronizationContext : SynchronizationContext
+               {
+                       Thread thread;
+                       readonly ConcurrentQueue<Tuple<SendOrPostCallback, object, ExecutionContext>> workQueue = new ConcurrentQueue<Tuple<SendOrPostCallback, object, ExecutionContext>> ();
+                       readonly AutoResetEvent workReady = new AutoResetEvent (false);
+
+                       public NestedSynchronizationContext ()
+                       {
+                               thread = new Thread (WorkerThreadProc) { IsBackground = true };
+                               thread.Start ();
+                       }
+
+                       public override void Post (SendOrPostCallback d, object state)
+                       {
+                               var context = ExecutionContext.Capture ();
+                               workQueue.Enqueue (Tuple.Create (d, state, context));
+                               workReady.Set ();
+                       }
+
+                       void WorkerThreadProc ()
+                       {
+                               if (!workReady.WaitOne (10000))
+                                       return;
+
+                               Tuple<SendOrPostCallback, object, ExecutionContext> work;
+
+                               while (workQueue.TryDequeue (out work)) {
+                                       ExecutionContext.Run (work.Item3, _ => {
+                                               var oldSyncContext = SynchronizationContext.Current;
+                                               SynchronizationContext.SetSynchronizationContext (this);
+                                               work.Item1 (_);
+                                               SynchronizationContext.SetSynchronizationContext (oldSyncContext);
+                                       }, work.Item2); 
+                               }
+                       }
+               }
+
                string progress;
                SynchronizationContext sc;
                ManualResetEvent mre;
@@ -211,6 +248,7 @@ namespace MonoTests.System.Runtime.CompilerServices
                }
 
                [Test]
+               [Ignore ("Incompatible with nunitlite")]
                public void FinishedTaskOnCompleted ()
                {
                        var mres = new ManualResetEvent (false);
@@ -230,7 +268,7 @@ namespace MonoTests.System.Runtime.CompilerServices
 
                        mres.Set ();
                        // this will only terminate correctly if the test was not executed from the main thread
-                       // e.g. Touch.Unit defaults to run tests on the main thread and this will return false
+                       // e.g. nunitlite/Touch.Unit defaults to run tests on the main thread and this will return false
                        Assert.AreEqual (Thread.CurrentThread.IsBackground, mres2.WaitOne (2000), "#2");;
                }
 
@@ -325,7 +363,33 @@ namespace MonoTests.System.Runtime.CompilerServices
 
                        SynchronizationContext.SetSynchronizationContext (null);
                }
+
+               [Test]
+               public void NestedLeakingSynchronizationContext ()
+               {
+                       var sc = SynchronizationContext.Current;
+                       if (sc == null)
+                               Assert.IsTrue (NestedLeakingSynchronizationContext_MainAsync (sc).Wait (5000), "#1");
+                       else
+                               Assert.Ignore ("NestedSynchronizationContext may never complete on custom context");
+               }
+
+               static async Task NestedLeakingSynchronizationContext_MainAsync (SynchronizationContext sc)
+               {
+                       Assert.AreSame (sc, SynchronizationContext.Current, "#1");
+                       await NestedLeakingSynchronizationContext_DoWorkAsync ();
+                       Assert.AreSame (sc, SynchronizationContext.Current, "#2");
+               }
+
+               static async Task NestedLeakingSynchronizationContext_DoWorkAsync ()
+               {
+                       var sc = new NestedSynchronizationContext ();
+                       SynchronizationContext.SetSynchronizationContext (sc);
+
+                       Assert.AreSame (sc, SynchronizationContext.Current);
+                       await Task.Yield ();
+                       Assert.AreSame (sc, SynchronizationContext.Current);
+               }
        }
 }
 
-#endif