mcs/class/corlib/Test/System.Threading/SemaphoreSlimTests.cs

   1 #if NET_4_0
   2 // SemaphoreSlimTests.cs
   3 //
   4 // Copyright (c) 2008 Jérémie "Garuma" Laval
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining a copy
   7 // of this software and associated documentation files (the "Software"), to deal
   8 // in the Software without restriction, including without limitation the rights
   9 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 // copies of the Software, and to permit persons to whom the Software is
  11 // furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 // THE SOFTWARE.
  23 //
  24 //
  25
  26 using System;
  27 using System.Linq;
  28 using System.Threading;
  29
  30 using MonoTests.System.Threading.Tasks;
  31
  32 using NUnit.Framework;
  33
  34 namespace MonoTests.System.Threading
  35 {
  36         [TestFixture]
  37         public class SemaphoreSlimTests
  38         {
  39                 SemaphoreSlim sem;
  40
  41                 [SetUp]
  42                 public void Setup()
  43                 {
  44                         sem = new SemaphoreSlim(5);
  45                 }
  46
  47                 [Test]
  48                 public void CurrentCountMaxTestCase()
  49                 {
  50                         using (var semMax = new SemaphoreSlim(5, 5)) {
  51                                 semMax.Wait();
  52                                 try {
  53                                         semMax.Release(3);
  54                                         Assert.Fail ();
  55                                 } catch (SemaphoreFullException) {}
  56                         }
  57                 }
  58
  59                 [Test]
  60                 public void CurrentCountTestCase()
  61                 {
  62                         sem.Wait();
  63                         sem.Wait();
  64                         sem.Release();
  65                         Assert.AreEqual(4, sem.CurrentCount);
  66                 }
  67
  68                 [Test]
  69                 public void WaitStressTest()
  70                 {
  71                         int count = -1;
  72                         bool[] array = new bool[7];
  73                         int worker = 0;
  74                         bool coherent = true;
  75
  76                         ParallelTestHelper.ParallelStressTest (sem, delegate (SemaphoreSlim s) {
  77                                 int index = Interlocked.Increment (ref count);
  78                                 s.Wait ();
  79                                 if (Interlocked.Increment (ref worker) > 5)
  80                                         coherent = false;
  81                                 Thread.Sleep (40);
  82                                 Interlocked.Decrement (ref worker);
  83                                 s.Release ();
  84                                 array[index] = true;
  85                         }, 7);
  86
  87                         bool result = array.Aggregate ((acc, e) => acc && e);
  88
  89                         Assert.IsTrue (result, "#1");
  90                         Assert.AreEqual (5, sem.CurrentCount, "#2");
  91                         Assert.IsTrue (coherent, "#3");
  92                 }
  93         }
  94 }
  95 #endif