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

   1 // WriteOnceBlockTest.cs
   2 //
   3 // Author:
   4 //       Jérémie "garuma" Laval <jeremie.laval@gmail.com>
   5 //       Petr Onderka <gsvick@gmail.com>
   6 //
   7 // Copyright (c) 2011 Jérémie "garuma" Laval
   8 // Copyright (c) 2012 Petr Onderka
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining a copy
  11 // of this software and associated documentation files (the "Software"), to deal
  12 // in the Software without restriction, including without limitation the rights
  13 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14 // copies of the Software, and to permit persons to whom the Software is
  15 // furnished to do so, subject to the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be included in
  18 // all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26 // THE SOFTWARE.
  27
  28 using System;
  29 using System.Threading;
  30 using System.Collections.Generic;
  31 using System.Threading.Tasks.Dataflow;
  32 using NUnit.Framework;
  33
  34 namespace MonoTests.System.Threading.Tasks.Dataflow {
  35         [TestFixture]
  36         public class WriteOnceBlockTest {
  37                 [Test]
  38                 public void BasicUsageTest ()
  39                 {
  40                         bool act1 = false, act2 = false;
  41                         var evt = new CountdownEvent (2);
  42
  43                         var block = new WriteOnceBlock<int> (null);
  44                         var action1 = new ActionBlock<int> (i =>
  45                         {
  46                                 act1 = i == 42;
  47                                 evt.Signal ();
  48                         });
  49                         var action2 = new ActionBlock<int> (i =>
  50                         {
  51                                 act2 = i == 42;
  52                                 evt.Signal ();
  53                         });
  54
  55                         block.LinkTo (action1);
  56                         block.LinkTo (action2);
  57
  58                         Assert.IsTrue (block.Post (42));
  59                         Assert.IsFalse (block.Post (43));
  60
  61                         Assert.IsTrue (evt.Wait (100));
  62
  63                         Assert.IsTrue (act1);
  64                         Assert.IsTrue (act2);
  65                 }
  66
  67                 [Test]
  68                 public void LinkAfterPostTest ()
  69                 {
  70                         bool act = false;
  71                         var evt = new ManualResetEventSlim ();
  72
  73                         var block = new WriteOnceBlock<int> (null);
  74                         var action = new ActionBlock<int> (i =>
  75                         {
  76                                 act = i == 42;
  77                                 evt.Set ();
  78                         });
  79
  80                         Assert.IsTrue (block.Post (42));
  81
  82                         block.LinkTo (action);
  83
  84                         Assert.IsTrue (evt.Wait (100));
  85
  86                         Assert.IsTrue (act);
  87                 }
  88
  89                 [Test]
  90                 public void PostponedTest ()
  91                 {
  92                         var block = new WriteOnceBlock<int> (null);
  93                         var target = new BufferBlock<int> (
  94                                 new DataflowBlockOptions { BoundedCapacity = 1 });
  95                         block.LinkTo (target);
  96
  97                         Assert.IsTrue (target.Post (1));
  98
  99                         Assert.IsTrue (block.Post (2));
 100
 101                         Assert.AreEqual (1, target.Receive (TimeSpan.FromMilliseconds (100)));
 102                         Assert.AreEqual (2, target.Receive (TimeSpan.FromMilliseconds (100)));
 103                 }
 104
 105                 [Test]
 106                 public void QueuedMessageTest ()
 107                 {
 108                         var scheduler = new TestScheduler ();
 109                         var block = new WriteOnceBlock<int> (null,
 110                                 new DataflowBlockOptions { TaskScheduler = scheduler });
 111                         var target = new BufferBlock<int> ();
 112                         block.LinkTo (target);
 113
 114                         Assert.IsTrue (block.Post (1));
 115
 116                         AssertEx.Throws<TimeoutException> (
 117                                 () => target.Receive (TimeSpan.FromMilliseconds (100)));
 118
 119                         scheduler.ExecuteAll ();
 120
 121                         int item;
 122                         Assert.IsTrue (target.TryReceive (out item));
 123                         Assert.AreEqual (1, item);
 124                 }
 125
 126                 [Test]
 127                 public void CloningTest ()
 128                 {
 129                         object act1 = null, act2 = null;
 130                         var evt = new CountdownEvent (2);
 131
 132                         object source = new object ();
 133                         var block = new WriteOnceBlock<object> (o => new object ());
 134                         var action1 = new ActionBlock<object> (i =>
 135                         {
 136                                 act1 = i;
 137                                 evt.Signal ();
 138                         });
 139                         var action2 = new ActionBlock<object> (i =>
 140                         {
 141                                 act2 = i;
 142                                 evt.Signal ();
 143                         });
 144
 145                         block.LinkTo (action1);
 146                         block.LinkTo (action2);
 147
 148                         Assert.IsTrue (block.Post (source));
 149
 150                         Assert.IsTrue (evt.Wait (100));
 151
 152                         Assert.IsNotNull (act1);
 153                         Assert.IsNotNull (act2);
 154
 155                         Assert.IsFalse (source.Equals (act1));
 156                         Assert.IsFalse (source.Equals (act2));
 157                         Assert.IsFalse (act2.Equals (act1));
 158                 }
 159
 160                 [Test]
 161                 public void WriteOnceBehaviorTest ()
 162                 {
 163                         bool act1 = false, act2 = false;
 164                         var evt = new CountdownEvent (2);
 165
 166                         var broadcast = new WriteOnceBlock<int> (null);
 167                         var action1 = new ActionBlock<int> (i =>
 168                         {
 169                                 act1 = i == 42;
 170                                 evt.Signal ();
 171                         });
 172                         var action2 = new ActionBlock<int> (i =>
 173                         {
 174                                 act2 = i == 42;
 175                                 evt.Signal ();
 176                         });
 177
 178                         broadcast.LinkTo (action1);
 179                         broadcast.LinkTo (action2);
 180
 181                         Assert.IsTrue (broadcast.Post (42));
 182
 183                         Assert.IsTrue (evt.Wait (100));
 184
 185                         Assert.IsTrue (act1);
 186                         Assert.IsTrue (act2);
 187
 188                         Assert.IsFalse (broadcast.Post (24));
 189                         Thread.Sleep (300);
 190
 191                         Assert.IsTrue (act1);
 192                         Assert.IsTrue (act2);
 193                 }
 194
 195                 [Test]
 196                 public void TryReceiveBehaviorTest ()
 197                 {
 198                         var block = new WriteOnceBlock<int> (null);
 199                         int foo;
 200                         Assert.IsFalse (block.TryReceive (null, out foo));
 201                         block.Post (42);
 202                         Assert.IsTrue (block.TryReceive (null, out foo));
 203                         Assert.AreEqual (42, foo);
 204                         Assert.IsTrue (block.TryReceive (null, out foo));
 205                         Assert.IsFalse (block.TryReceive (i => i == 0, out foo));
 206                         IList<int> bar;
 207                         Assert.IsTrue (((IReceivableSourceBlock<int>)block).TryReceiveAll (out bar));
 208                         CollectionAssert.AreEqual (new[] { 42 }, bar);
 209                 }
 210
 211                 [Test]
 212                 public void DontOfferTwiceTest ()
 213                 {
 214                         var scheduler = new TestScheduler ();
 215                         var block = new WriteOnceBlock<int> (null,
 216                                 new DataflowBlockOptions { TaskScheduler = scheduler });
 217                         var target =
 218                                 new TestTargetBlock<int> { Postpone = true };
 219                         block.LinkTo (target);
 220
 221                         Assert.IsFalse (target.HasPostponed);
 222
 223                         Assert.IsTrue (block.Post (1));
 224
 225                         scheduler.ExecuteAll ();
 226
 227                         Assert.IsTrue (target.HasPostponed);
 228
 229                         target.Postpone = false;
 230
 231                         int value;
 232                         Assert.IsTrue (target.RetryPostponed (out value));
 233                         Assert.AreEqual (1, value);
 234
 235                         block.LinkTo (new BufferBlock<int> ());
 236
 237                         scheduler.ExecuteAll ();
 238
 239                         Assert.AreEqual (default(int), target.DirectlyAccepted);
 240                 }
 241         }
 242 }