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
  46                         public override void OperationStarted ()
  47                         {
  48                                 base.OperationStarted ();
  49                         }
  50
  51                         public override void OperationCompleted ()
  52                         {
  53                                 base.OperationCompleted ();
  54                         }
  55
  56                         public override void Post (SendOrPostCallback d, object state)
  57                         {
  58                                 ++PostCounter;
  59                                 base.Post (d, state);
  60                         }
  61
  62                         public override void Send (SendOrPostCallback d, object state)
  63                         {
  64                                 base.Send (d, state);
  65                         }
  66                 }
  67
  68                 Task<int> task;
  69
  70                 [Test]
  71                 public void GetResultFaulted ()
  72                 {
  73                         TaskAwaiter<int> awaiter;
  74
  75                         task = new Task<int> (() => { throw new ApplicationException (); });
  76                         awaiter = task.GetAwaiter ();
  77                         task.RunSynchronously (TaskScheduler.Current);
  78
  79
  80                         Assert.IsTrue (awaiter.IsCompleted);
  81
  82                         try {
  83                                 awaiter.GetResult ();
  84                                 Assert.Fail ();
  85                         } catch (ApplicationException) {
  86                         }
  87                 }
  88
  89                 [Test]
  90                 public void GetResultNotCompleted ()
  91                 {
  92                         TaskAwaiter<int> awaiter;
  93
  94                         task = new Task<int> (() => 1);
  95                         awaiter = task.GetAwaiter ();
  96
  97                         try {
  98                                 awaiter.GetResult ();
  99                                 Assert.Fail ();
 100                         } catch (InvalidOperationException) {
 101                         }
 102                 }
 103
 104                 [Test]
 105                 public void GetResultCanceled ()
 106                 {
 107                         TaskAwaiter<int> awaiter;
 108
 109                         var token = new CancellationToken (true);
 110                         task = new Task<int> (() => 2, token);
 111                         awaiter = task.GetAwaiter ();
 112
 113                         try {
 114                                 awaiter.GetResult ();
 115                                 Assert.Fail ();
 116                         } catch (TaskCanceledException) {
 117                         }
 118                 }
 119
 120                 [Test]
 121                 public void ContextTest ()
 122                 {
 123                         var context = new MyContext ();
 124
 125                         var old = SynchronizationContext.Current;
 126                         SynchronizationContext.SetSynchronizationContext (context);
 127                         try {
 128                                 var t = new Task (delegate { });
 129                                 var a = t.GetAwaiter ();
 130                                 a.OnCompleted (delegate { });
 131                                 t.Start ();
 132                                 Assert.IsTrue (t.Wait (1000), "#1");
 133                         } finally {
 134                                 SynchronizationContext.SetSynchronizationContext (old);
 135                         }
 136
 137                         Assert.AreEqual (1, context.PostCounter, "#2");
 138                 }
 139         }
 140 }
 141
 142 #endif