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

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