mcs/class/corlib/Test/System.Runtime.CompilerServices/TaskAwaiterTest_T.cs

   1 //
   2 // TaskAwaiterTest_T.cs
   3 //
   4 // Authors:
   5 //      Marek Safar  <marek.safar@gmail.com>
   6 //
   7 // Copyright (C) 2011 Xamarin, Inc (http://www.xamarin.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 #if NET_4_5
  30
  31 using System;
  32 using System.Threading;
  33 using System.Threading.Tasks;
  34 using NUnit.Framework;
  35 using System.Runtime.CompilerServices;
  36
  37 namespace MonoTests.System.Runtime.CompilerServices
  38 {
  39         [TestFixture]
  40         public class TaskAwaiterTest_T
  41         {
  42                 class MyContext : SynchronizationContext
  43                 {
  44                         public int PostCounter;
  45                         public ManualResetEvent mre = new ManualResetEvent (false);
  46
  47                         public override void OperationStarted ()
  48                         {
  49                                 base.OperationStarted ();
  50                         }
  51
  52                         public override void OperationCompleted ()
  53                         {
  54                                 base.OperationCompleted ();
  55                         }
  56
  57                         public override void Post (SendOrPostCallback d, object state)
  58                         {
  59                                 ++PostCounter;
  60                                 mre.Set ();
  61                                 base.Post (d, state);
  62                         }
  63
  64                         public override void Send (SendOrPostCallback d, object state)
  65                         {
  66                                 base.Send (d, state);
  67                         }
  68                 }
  69
  70                 Task<int> task;
  71
  72                 [Test]
  73                 public void GetResultFaulted ()
  74                 {
  75                         TaskAwaiter<int> awaiter;
  76
  77                         task = new Task<int> (() => { throw new ApplicationException (); });
  78                         awaiter = task.GetAwaiter ();
  79                         task.RunSynchronously (TaskScheduler.Current);
  80
  81
  82                         Assert.IsTrue (awaiter.IsCompleted);
  83
  84                         try {
  85                                 awaiter.GetResult ();
  86                                 Assert.Fail ();
  87                         } catch (ApplicationException) {
  88                         }
  89                 }
  90
  91                 [Category ("NotWorking")] // Bug #18629
  92                 [Test]
  93                 public void GetResultAfterMultipleExceptions ()
  94                 {
  95                         TaskAwaiter<object> awaiter;
  96                         CreateFaultedAwaiter (out awaiter);
  97                         try {
  98                                 awaiter.GetResult ();
  99                                 Assert.Fail ();
 100                         } catch (AggregateException ae) {
 101                                 Assert.IsFalse (ae.StackTrace.Contains ("--- End"), "#1");
 102                                 Assert.IsTrue (ae.StackTrace.Contains ("CreateFaultedAwaiter"), "#2");
 103                         }
 104                 }
 105
 106                 static void CreateFaultedAwaiter (out TaskAwaiter<object> awaiter)
 107                 {
 108                         var faultedSource = new TaskCompletionSource<object>();
 109                         faultedSource.SetException(new Exception());
 110                         awaiter = faultedSource.Task.GetAwaiter ();
 111                         try {
 112                                 awaiter.GetResult ();
 113                         } catch {
 114                         }
 115
 116                         try {
 117                                 awaiter.GetResult ();
 118                         } catch {
 119                         }
 120                 }
 121
 122                 [Test]
 123                 public void GetResultCanceled ()
 124                 {
 125                         TaskAwaiter<int> awaiter;
 126
 127                         var token = new CancellationToken (true);
 128                         task = new Task<int> (() => 2, token);
 129                         awaiter = task.GetAwaiter ();
 130
 131                         try {
 132                                 awaiter.GetResult ();
 133                                 Assert.Fail ();
 134                         } catch (TaskCanceledException) {
 135                         }
 136                 }
 137
 138                 [Test]
 139                 public void ContextTest ()
 140                 {
 141                         TaskAwaiter awaiter;
 142
 143                         var task = new Task (() => { throw new ApplicationException (); });
 144                         awaiter = task.GetAwaiter ();
 145                         task.RunSynchronously (TaskScheduler.Current);
 146
 147
 148                         Assert.IsTrue (awaiter.IsCompleted);
 149
 150                         try {
 151                                 awaiter.GetResult ();
 152                                 Assert.Fail ();
 153                         } catch (ApplicationException) {
 154                         }
 155
 156                         var context = new MyContext ();
 157
 158                         var old = SynchronizationContext.Current;
 159                         SynchronizationContext.SetSynchronizationContext (context);
 160                         try {
 161                                 var t = new Task (delegate { });
 162                                 var a = t.GetAwaiter ();
 163                                 a.OnCompleted (delegate { });
 164                                 t.Start ();
 165                                 Assert.IsTrue (t.Wait (5000), "#1");
 166                         } finally {
 167                                 SynchronizationContext.SetSynchronizationContext (old);
 168                         }
 169
 170                         Assert.IsTrue (context.mre.WaitOne (5000), "#2");
 171                         Assert.AreEqual (1, context.PostCounter, "#3");
 172                 }
 173         }
 174 }
 175
 176 #endif