mcs/class/corlib/Test/System.Threading.Tasks/Task_T_Test.cs

   1 // Task_T_Tests.cs
   2 //
   3 // Copyright (c) 2008 Jérémie "Garuma" Laval
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining a copy
   6 // of this software and associated documentation files (the "Software"), to deal
   7 // in the Software without restriction, including without limitation the rights
   8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 // copies of the Software, and to permit persons to whom the Software is
  10 // furnished to do so, subject to the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be included in
  13 // all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21 // THE SOFTWARE.
  22 //
  23 //
  24
  25
  26 using System;
  27 using System.Threading;
  28 using System.Threading.Tasks;
  29
  30 using NUnit.Framework;
  31
  32 namespace MonoTests.System.Threading.Tasks
  33 {
  34         [TestFixture]
  35         public class Task_T_Tests
  36         {
  37                 Task<int> InitTestTask()
  38                 {
  39                         return Task.Factory.StartNew<int> (() => 5);
  40                 }
  41
  42                 [Test]
  43                 public void SimpleTaskTestCase ()
  44                 {
  45                         Task<int> f = InitTestTask ();
  46
  47                         Assert.IsNotNull(f, "#1");
  48                         Assert.AreEqual(5, f.Result, "#2");
  49                 }
  50
  51                 [Test]
  52                 public void TaskContinueWithTestCase ()
  53                 {
  54                         bool result = false;
  55
  56                         Task<int> f = InitTestTask ();
  57                         Task<int> cont = f.ContinueWith ((future) => { result = true; return future.Result * 2; });
  58                         f.Wait ();
  59                         cont.Wait ();
  60
  61                         Assert.IsNotNull (cont, "#1");
  62                         Assert.IsTrue (result, "#2");
  63                         Assert.AreEqual (10, cont.Result);
  64                 }
  65
  66                 static Task<int> CreateNestedFuture(int level)
  67                 {
  68                         if (level == 0)
  69                                 return Task.Factory.StartNew(() => { Thread.Sleep (1); return 1; });
  70
  71                         var t = CreateNestedFuture(level - 1);
  72                         return Task.Factory.StartNew(() => t.Result + 1);
  73                 }
  74
  75                 [Test]
  76                 public void NestedFutureTest ()
  77                 {
  78                         ParallelTestHelper.Repeat (delegate {
  79                                 var t = CreateNestedFuture(10);
  80                                 var t2 = CreateNestedFuture(100);
  81                                 var t3 = CreateNestedFuture(100);
  82
  83                                 Assert.AreEqual (11, t.Result);
  84                                 Assert.AreEqual (101, t2.Result);
  85                                 Assert.AreEqual (101, t3.Result);
  86                    }, 50);
  87                 }
  88
  89                 [Test]
  90                 public void FaultedFutureTest ()
  91                 {
  92                         var thrown = new ApplicationException ();
  93                         var f = Task<int>.Factory.StartNew (() => { throw thrown; });
  94                         AggregateException ex = null;
  95                         try {
  96                                 f.Wait ();
  97                         } catch (AggregateException e) {
  98                                 ex = e;
  99                         }
 100
 101                         Assert.IsNotNull (ex);
 102                         Assert.AreEqual (thrown, ex.InnerException);
 103                         Assert.AreEqual (thrown, f.Exception.InnerException);
 104                         Assert.AreEqual (TaskStatus.Faulted, f.Status);
 105
 106                         ex = null;
 107                         try {
 108                                 var result = f.Result;
 109                         } catch (AggregateException e) {
 110                                 ex = e;
 111                         }
 112
 113                         Assert.IsNotNull (ex);
 114                         Assert.AreEqual (TaskStatus.Faulted, f.Status);
 115                         Assert.AreEqual (thrown, f.Exception.InnerException);
 116                         Assert.AreEqual (thrown, ex.InnerException);
 117                 }
 118         }
 119 }