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

   1 //
   2 // ThreadLazyTests.cs
   3 //
   4 // Author:
   5 //       Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
   6 //
   7 // Copyright (c) 2009 Jérémie "Garuma" Laval
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining a copy
  10 // of this software and associated documentation files (the "Software"), to deal
  11 // in the Software without restriction, including without limitation the rights
  12 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13 // copies of the Software, and to permit persons to whom the Software is
  14 // furnished to do so, subject to the following conditions:
  15 //
  16 // The above copyright notice and this permission notice shall be included in
  17 // all copies or substantial portions of the Software.
  18 //
  19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25 // THE SOFTWARE.
  26
  27 using System;
  28 using System.Threading;
  29
  30 using NUnit;
  31 using NUnit.Framework;
  32 #if !MOBILE
  33 using NUnit.Framework.SyntaxHelpers;
  34 #endif
  35
  36 namespace MonoTests.System.Threading
  37 {
  38         [TestFixtureAttribute]
  39         public class ThreadLocalTests
  40         {
  41                 ThreadLocal<int> threadLocal;
  42                 int nTimes;
  43
  44                 [SetUp]
  45                 public void Setup ()
  46                 {
  47                         nTimes = 0;
  48                         threadLocal = new ThreadLocal<int> (() => { Interlocked.Increment (ref nTimes); return 42; });
  49                 }
  50
  51                 [Test]
  52                 public void SingleThreadTest ()
  53                 {
  54                         AssertThreadLocal ();
  55                 }
  56
  57                 [Test]
  58                 public void ThreadedTest ()
  59                 {
  60                         AssertThreadLocal ();
  61
  62                         Thread t = new Thread ((object o) => { Interlocked.Decrement (ref nTimes); AssertThreadLocal (); });
  63                         t.Start ();
  64                         t.Join ();
  65                 }
  66
  67                 [Test]
  68                 public void InitializeThrowingTest ()
  69                 {
  70                         int callTime = 0;
  71                         threadLocal = new ThreadLocal<int> (() => {
  72                                         Interlocked.Increment (ref callTime);
  73                                         throw new ApplicationException ("foo");
  74                                 });
  75
  76                         Exception exception = null;
  77
  78                         try {
  79                                 var foo = threadLocal.Value;
  80                         } catch (Exception e) {
  81                                 exception = e;
  82                         }
  83
  84                         Assert.IsNotNull (exception, "#1");
  85                         Assert.That (exception, Is.TypeOf (typeof (ApplicationException)), "#2");
  86                         Assert.AreEqual (1, callTime, "#3");
  87
  88                         exception = null;
  89
  90                         try {
  91                                 var foo = threadLocal.Value;
  92                         } catch (Exception e) {
  93                                 exception = e;
  94                         }
  95
  96                         Assert.IsNotNull (exception, "#4");
  97                         Assert.That (exception, Is.TypeOf (typeof (ApplicationException)), "#5");
  98                         Assert.AreEqual (2, callTime, "#6");
  99                 }
 100
 101                 [Category ("NotDotNet")] // nunit results in stack overflow
 102                 public void MultipleReferenceToValueTest ()
 103                 {
 104                         try {
 105                                 threadLocal = new ThreadLocal<int> (() => threadLocal.Value + 1);
 106                                 var v = threadLocal.Value;
 107
 108                                 Assert.Fail ("#1");
 109                         } catch (InvalidOperationException e) {
 110                         }
 111                 }
 112
 113                 [Test]
 114                 public void DefaultThreadLocalInitTest ()
 115                 {
 116                         var local = new ThreadLocal<DateTime> ();
 117                         var local2 = new ThreadLocal<object> ();
 118
 119                         Assert.AreEqual (default (DateTime), local.Value);
 120                         Assert.AreEqual (default (object), local2.Value);
 121                 }
 122
 123                 [Test, ExpectedException (typeof (ObjectDisposedException))]
 124                 public void DisposedOnValueTest ()
 125                 {
 126                         var tl = new ThreadLocal<int> ();
 127                         tl.Dispose ();
 128                         var value = tl.Value;
 129                 }
 130
 131                 [Test, ExpectedException (typeof (ObjectDisposedException))]
 132                 public void DisposedOnIsValueCreatedTest ()
 133                 {
 134                         var tl = new ThreadLocal<int> ();
 135                         tl.Dispose ();
 136                         var value = tl.IsValueCreated;
 137                 }
 138
 139                 [Test]
 140                 public void PerThreadException ()
 141                 {
 142                         int callTime = 0;
 143                         threadLocal = new ThreadLocal<int> (() => {
 144                                         if (callTime == 1)
 145                                                 throw new ApplicationException ("foo");
 146                                         Interlocked.Increment (ref callTime);
 147                                         return 43;
 148                                 });
 149
 150                         Exception exception = null;
 151
 152                         var foo = threadLocal.Value;
 153                         bool thread_value_created = false;
 154                         Assert.AreEqual (43, foo, "#3");
 155                         Thread t = new Thread ((object o) => {
 156                                 try {
 157                                         var foo2 = threadLocal.Value;
 158                                 } catch (Exception e) {
 159                                         exception = e;
 160                                 }
 161                                 // should be false and not throw
 162                                 thread_value_created = threadLocal.IsValueCreated;
 163                         });
 164                         t.Start ();
 165                         t.Join ();
 166                         Assert.AreEqual (false, thread_value_created, "#4");
 167                         Assert.IsNotNull (exception, "#5");
 168                         Assert.That (exception, Is.TypeOf (typeof (ApplicationException)), "#6");
 169                 }
 170
 171                 void AssertThreadLocal ()
 172                 {
 173                         Assert.IsFalse (threadLocal.IsValueCreated, "#1");
 174                         Assert.AreEqual (42, threadLocal.Value, "#2");
 175                         Assert.IsTrue (threadLocal.IsValueCreated, "#3");
 176                         Assert.AreEqual (42, threadLocal.Value, "#4");
 177                         Assert.AreEqual (1, nTimes, "#5");
 178                 }
 179
 180                 class SetMreOnFinalize
 181                 {
 182                         ManualResetEventSlim m_mres;
 183
 184                         public SetMreOnFinalize (ManualResetEventSlim mres)
 185                         {
 186                                 m_mres = mres;
 187                         }
 188
 189                         ~SetMreOnFinalize()
 190                         {
 191                                 m_mres.Set();
 192                         }
 193                 }
 194
 195                 [Test]
 196                 [Category ("NotWorking")] // Finalizers aren't guaranteed
 197 #if MONOTOUCH
 198                 [Category ("NotWorking")] // https://bugzilla.xamarin.com/show_bug.cgi?id=34617
 199 #endif
 200                 public void DisposeOnThreadExit ()
 201                 {
 202                         var threadLocal = new ThreadLocal<SetMreOnFinalize>();
 203                         var mres = new ManualResetEventSlim(false);
 204                         var thread = new Thread (() => { threadLocal.Value = new SetMreOnFinalize (mres); });
 205
 206                         thread.Start ();
 207                         thread.Join ();
 208
 209                         SpinWait.SpinUntil (() => {
 210                                 GC.Collect();
 211                                 GC.WaitForPendingFinalizers();
 212                                 GC.Collect();
 213                                 return mres.IsSet;
 214                         }, 500);
 215
 216                         if (!mres.IsSet)
 217                                 Assert.Fail ("Finalizer didn't run after thread termination");
 218                 }
 219         }
 220 }