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

   1 //
   2 // BufferBlockTest.cs
   3 //
   4 // Author:
   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;
  30 using System.Threading;
  31 using System.Threading.Tasks.Dataflow;
  32 using NUnit.Framework;
  33
  34 namespace MonoTests.System.Threading.Tasks.Dataflow {
  35         [TestFixture]
  36         public class BufferBlockTest {
  37                 [Test]
  38                 public void BasicUsageTest ()
  39                 {
  40                         int data = -1;
  41                         var evt = new ManualResetEventSlim (false);
  42                         var buffer = new BufferBlock<int> ();
  43                         var action = new ActionBlock<int> (i =>
  44                         {
  45                                 data = i;
  46                                 evt.Set ();
  47                         });
  48                         buffer.LinkTo (action);
  49
  50                         Assert.IsTrue (buffer.Post (42));
  51                         evt.Wait ();
  52                         Assert.AreEqual (42, data);
  53                 }
  54
  55                 [Test]
  56                 public void LateBindingTest ()
  57                 {
  58                         var buffer = new BufferBlock<int> ();
  59                         var evt = new CountdownEvent (10);
  60
  61                         for (int i = 0; i < 10; i++)
  62                                 Assert.IsTrue (buffer.Post (i));
  63
  64                         var block = new ActionBlock<int> (i => evt.Signal ());
  65                         buffer.LinkTo (block);
  66
  67                         evt.Wait ();
  68                 }
  69
  70                 [Test]
  71                 public void MultipleBindingTest ()
  72                 {
  73                         var buffer = new BufferBlock<int> ();
  74                         var evt = new CountdownEvent (10);
  75
  76                         int count = 0;
  77
  78                         var block = new ActionBlock<int> (i =>
  79                         {
  80                                 Interlocked.Decrement (ref count);
  81                                 evt.Signal ();
  82                         });
  83                         IDisposable bridge = buffer.LinkTo (block);
  84                         for (int i = 0; i < 10; i++)
  85                                 Assert.IsTrue (buffer.Post (i));
  86                         evt.Wait ();
  87
  88                         Assert.AreEqual (-10, count);
  89                         count = 0;
  90                         evt.Reset ();
  91                         bridge.Dispose ();
  92
  93                         var block2 = new ActionBlock<int> (i =>
  94                         {
  95                                 Interlocked.Increment (ref count);
  96                                 evt.Signal ();
  97                         });
  98                         buffer.LinkTo (block2);
  99                         for (int i = 0; i < 10; i++)
 100                                 Assert.IsTrue (buffer.Post (i));
 101                         evt.Wait ();
 102
 103                         Assert.AreEqual (10, count);
 104                 }
 105
 106                 [Test]
 107                 public void ConsumeToAcceptTest ()
 108                 {
 109                         var source = new TestSourceBlock<int> ();
 110                         var buffer = new BufferBlock<int> ();
 111                         var target = (ITargetBlock<int>)buffer;
 112
 113                         var header = new DataflowMessageHeader (1);
 114                         source.AddMessage (header, 1);
 115
 116                         Assert.AreEqual (DataflowMessageStatus.Accepted,
 117                                 target.OfferMessage (header, 1, source, true));
 118
 119                         Assert.IsTrue (source.WasConsumed (header));
 120                         Assert.IsFalse (source.WasReserved (header));
 121                 }
 122         }
 123 }