mcs/class/System.Threading.Tasks.Dataflow/Test/System.Threading.Tasks.Dataflow/TransformManyBlockTest.cs

   1 //
   2 // TransformManyBlockTest.cs
   3 //
   4 // Authors:
   5 //       Jérémie "garuma" Laval <jeremie.laval@gmail.com>
   6 //       Petr Onderka <gsvick@gmail.com>
   7 //
   8 // Copyright (c) 2011 Jérémie "garuma" Laval
   9 // Copyright (c) 2012 Petr Onderka
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining a copy
  12 // of this software and associated documentation files (the "Software"), to deal
  13 // in the Software without restriction, including without limitation the rights
  14 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  15 // copies of the Software, and to permit persons to whom the Software is
  16 // furnished to do so, subject to the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be included in
  19 // all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  24 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  25 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  26 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  27 // THE SOFTWARE.
  28
  29 using System.Collections.Generic;
  30 using System.Linq;
  31 using System.Threading;
  32 using System.Threading.Tasks;
  33 using System.Threading.Tasks.Dataflow;
  34
  35 using NUnit.Framework;
  36
  37 namespace MonoTests.System.Threading.Tasks.Dataflow {
  38         [TestFixture]
  39         public class TransformManyBlockTest {
  40                 [Test]
  41                 public void BasicUsageTest ()
  42                 {
  43                         int insIndex = -1;
  44                         int[] array = new int[5 + 3];
  45                         var evt = new CountdownEvent (array.Length);
  46
  47                         var block = new ActionBlock<int> (i => { array[Interlocked.Increment (ref insIndex)] = i; evt.Signal (); });
  48                         var trsm = new TransformManyBlock<int, int> (i => Enumerable.Range (0, i));
  49                         trsm.LinkTo (block);
  50
  51                         trsm.Post (5);
  52                         trsm.Post (3);
  53
  54                         evt.Wait ();
  55
  56                         CollectionAssert.AreEquivalent (new int[] { 0, 1, 2, 3, 4, 0, 1, 2 }, array);
  57                 }
  58
  59                 [Test]
  60                 public void DeferredUsageTest ()
  61                 {
  62                         int insIndex = -1;
  63                         int[] array = new int[5 + 3];
  64                         var evt = new CountdownEvent (array.Length);
  65
  66                         var block = new ActionBlock<int> (i => { array[Interlocked.Increment (ref insIndex)] = i; evt.Signal (); });
  67                         var trsm = new TransformManyBlock<int, int> (i => Enumerable.Range (0, i));
  68
  69                         trsm.Post (5);
  70                         trsm.Post (3);
  71
  72                         trsm.LinkTo (block);
  73                         evt.Wait ();
  74
  75                         CollectionAssert.AreEquivalent (new int[] { 0, 1, 2, 3, 4, 0, 1, 2 }, array);
  76                 }
  77
  78                 [Test]
  79                 public void NullResultTest ()
  80                 {
  81                         bool received = false;
  82
  83                         var transformMany =
  84                                 new TransformManyBlock<int, int> (i => (IEnumerable<int>)null);
  85                         var action = new ActionBlock<int> (i => received = true);
  86                         transformMany.LinkTo (action);
  87
  88                         Assert.IsTrue (transformMany.Post (1), "#1");
  89
  90                         transformMany.Complete ();
  91                         Assert.IsTrue (transformMany.Completion.Wait (100), "#2");
  92                         Assert.IsFalse (received, "#3");
  93                 }
  94
  95                 [Test]
  96                 public void AsyncNullTest ()
  97                 {
  98                         var scheduler = new TestScheduler ();
  99                         var block = new TransformManyBlock<int, int> (
 100                                 i => (Task<IEnumerable<int>>)null,
 101                                 new ExecutionDataflowBlockOptions { TaskScheduler = scheduler });
 102
 103                         Assert.IsTrue (block.Post (1));
 104
 105                         scheduler.ExecuteAll ();
 106
 107                         Assert.IsFalse (block.Completion.Wait (100));
 108
 109                         block.Complete ();
 110
 111                         Assert.IsTrue (block.Completion.Wait (100));
 112                 }
 113
 114                 [Test]
 115                 public void AsyncCancelledTest ()
 116                 {
 117                         var scheduler = new TestScheduler ();
 118                         var block = new TransformManyBlock<int, int> (
 119                                 i =>
 120                                 {
 121                                         var tcs = new TaskCompletionSource<IEnumerable<int>> ();
 122                                         tcs.SetCanceled ();
 123                                         return tcs.Task;
 124                                 }, new ExecutionDataflowBlockOptions { TaskScheduler = scheduler });
 125
 126                         Assert.IsTrue (block.Post (1));
 127
 128                         scheduler.ExecuteAll ();
 129
 130                         Assert.IsFalse (block.Completion.Wait (100));
 131                 }
 132         }
 133 }