mcs/class/System.Threading.Tasks.Dataflow/Test/System.Threading.Tasks.Dataflow/JoinBlock`3Test.cs

   1 //
   2 // JoinBlockTest.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 JoinBlock3Test {
  37                 [Test]
  38                 public void BasicUsageTest ()
  39                 {
  40                         Tuple<int, int, int> tuple = null;
  41                         var evt = new ManualResetEventSlim (false);
  42
  43                         var ablock = new ActionBlock<Tuple<int, int, int>> (t =>
  44                         {
  45                                 tuple = t;
  46                                 evt.Set ();
  47                         });
  48                         var block = new JoinBlock<int, int, int> ();
  49                         block.LinkTo (ablock);
  50
  51                         block.Target1.Post (42);
  52
  53                         evt.Wait (500);
  54                         Assert.IsNull (tuple);
  55
  56                         block.Target2.Post (24);
  57
  58                         evt.Wait (500);
  59                         Assert.IsNull (tuple);
  60
  61                         block.Target3.Post (44);
  62
  63                         evt.Wait ();
  64                         Assert.IsNotNull (tuple);
  65                         Assert.AreEqual (42, tuple.Item1);
  66                         Assert.AreEqual (24, tuple.Item2);
  67                         Assert.AreEqual (44, tuple.Item3);
  68                 }
  69
  70                 [Test]
  71                 public void CompletionTest ()
  72                 {
  73                         var block = new JoinBlock<int, int, int> ();
  74
  75                         Assert.IsTrue (block.Target1.Post (1));
  76
  77                         block.Complete ();
  78
  79                         Tuple<int, int, int> tuple;
  80                         Assert.IsFalse (block.TryReceive (out tuple));
  81
  82                         Assert.IsTrue (block.Completion.Wait (100));
  83                 }
  84
  85                 [Test]
  86                 public void MaxNumberOfGroupsTest ()
  87                 {
  88                         var scheduler = new TestScheduler ();
  89                         var block = new JoinBlock<int, int, int> (
  90                                 new GroupingDataflowBlockOptions
  91                                 { MaxNumberOfGroups = 1, TaskScheduler = scheduler });
  92
  93                         Assert.IsTrue (block.Target1.Post (1));
  94
  95                         Assert.IsFalse (block.Target1.Post (2));
  96
  97                         Assert.IsTrue (block.Target2.Post (3));
  98                         Assert.IsTrue (block.Target3.Post (4));
  99
 100                         Assert.IsFalse (block.Target3.Post (4));
 101                         Assert.IsFalse (block.Target2.Post (4));
 102
 103                         Tuple<int, int, int> batch;
 104                         Assert.IsTrue (block.TryReceive (out batch));
 105                         Assert.AreEqual (Tuple.Create (1, 3, 4), batch);
 106
 107                         Assert.IsFalse (block.TryReceive (out batch));
 108
 109                         scheduler.ExecuteAll ();
 110
 111                         Assert.IsTrue (block.Completion.Wait (100));
 112                 }
 113
 114                 [Test]
 115                 public void NonGreedyMaxNumberOfGroupsTest ()
 116                 {
 117                         var scheduler = new TestScheduler ();
 118                         var block = new JoinBlock<int, int, int> (
 119                                 new GroupingDataflowBlockOptions
 120                                 { MaxNumberOfGroups = 1, Greedy = false, TaskScheduler = scheduler });
 121                         var source1 = new TestSourceBlock<int> ();
 122                         var source2 = new TestSourceBlock<int> ();
 123                         var source3 = new TestSourceBlock<int> ();
 124
 125                         var header1 = new DataflowMessageHeader (1);
 126                         source1.AddMessage (header1, 11);
 127                         source2.AddMessage (header1, 21);
 128                         source3.AddMessage (header1, 31);
 129
 130                         Assert.AreEqual (DataflowMessageStatus.Postponed,
 131                                 block.Target1.OfferMessage (header1, 11, source1, false));
 132                         Assert.AreEqual (DataflowMessageStatus.Postponed,
 133                                 block.Target2.OfferMessage (header1, 21, source2, false));
 134                         Assert.AreEqual (DataflowMessageStatus.Postponed,
 135                                 block.Target3.OfferMessage (header1, 31, source3, false));
 136
 137                         scheduler.ExecuteAll ();
 138
 139                         Assert.IsTrue (source1.WasConsumed (header1));
 140                         Assert.IsTrue (source2.WasConsumed (header1));
 141                         Assert.IsTrue (source3.WasConsumed (header1));
 142
 143                         var header2 = new DataflowMessageHeader (2);
 144                         Assert.AreEqual (DataflowMessageStatus.DecliningPermanently,
 145                                 block.Target1.OfferMessage (header2, 21, source1, false));
 146
 147                         Tuple<int, int, int> tuple;
 148                         Assert.IsTrue (block.TryReceive (out tuple));
 149                         Assert.AreEqual (Tuple.Create (11, 21, 31), tuple);
 150
 151                         Assert.IsTrue (block.Completion.Wait (100));
 152                 }
 153         }
 154 }