mcs/class/WindowsBase/Test/System.Windows.Threading/DispatcherTest.cs

   1 //
   2 // Tests for System.Windows.Threading.Dispatcher.cs
   3 //
   4 // Author:
   5 //    Miguel de Icaza (miguel@novell.com)
   6 //
   7
   8 //
   9 // Copyright (C) 2006 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using NUnit.Framework;
  32 using System;
  33 using System.IO;
  34 using System.Globalization;
  35 using System.Windows.Threading;
  36 using System.Threading;
  37
  38 namespace MonoTests.System.Windows.Threading
  39 {
  40
  41         delegate void Action ();
  42
  43         [TestFixture]
  44         public class DispatcherTest {
  45                 EventWaitHandle wait, wait2;
  46                 DispatcherOperation op;
  47
  48                 [SetUp]
  49                 public void DispatcherSetup ()
  50                 {
  51                         wait = new EventWaitHandle (false, EventResetMode.AutoReset);
  52                         wait2 = new EventWaitHandle (false, EventResetMode.AutoReset);
  53                 }
  54
  55                 //
  56                 // Tests that fields in a DispatcherOperation can be issued from
  57                 // a separate thread
  58                 //
  59                 [Test]
  60                 public void TestDispatcherOpOnThread ()
  61                 {
  62                         Thread t = new Thread (new ThreadStart (thread));
  63                         Dispatcher d = Dispatcher.CurrentDispatcher;
  64
  65                         t.Start ();
  66                         op = Dispatcher.CurrentDispatcher.BeginInvoke (DispatcherPriority.Normal, (Action) delegate {
  67                                 Console.WriteLine ("Some methods");
  68                         });
  69                         wait.Set ();
  70                         wait2.WaitOne ();
  71                 }
  72
  73                 void thread ()
  74                 {
  75                         wait.WaitOne ();
  76                         op.Priority = DispatcherPriority.DataBind;
  77                         wait2.Set ();
  78                 }
  79
  80                 [Test]
  81                 public void TestDispatcherOrder ()
  82                 {
  83                         Dispatcher d = Dispatcher.CurrentDispatcher;
  84
  85                         DispatcherFrame frame = new DispatcherFrame ();
  86                         bool fail = true;
  87                         int next = 1;
  88
  89                         d.BeginInvoke (DispatcherPriority.Normal, (Action) delegate {
  90                                 if (next != 3)
  91                                         throw new Exception ("Expected state 3, got " + next.ToString ());
  92
  93                                 next = 4;
  94                                 Console.WriteLine ("First");
  95                         });
  96                         d.BeginInvoke (DispatcherPriority.Normal, (Action) delegate {
  97                                 if (next != 4)
  98                                         throw new Exception ("Expected state 4, got " + next.ToString ());
  99
 100                                 next = 5;
 101                                 Console.WriteLine ("Second");
 102                         });
 103                         d.BeginInvoke (DispatcherPriority.Send, (Action) delegate {
 104                                 if (next != 1)
 105                                         throw new Exception ("Expected state 1, got " + next.ToString ());
 106                                 next = 2;
 107                                 Console.WriteLine ("High Priority");
 108                                 d.BeginInvoke (DispatcherPriority.Send, (Action) delegate {
 109                                         if (next != 2)
 110                                                 throw new Exception ("Expected state 2, got " + next.ToString ());
 111
 112                                         next = 3;
 113                                         Console.WriteLine ("INSERTED");
 114                                 });
 115                         });
 116                         d.BeginInvoke (DispatcherPriority.SystemIdle, (Action) delegate {
 117                                 if (next != 6)
 118                                         throw new Exception ("Expected state 6, got " + next.ToString ());
 119
 120                                 Console.WriteLine ("Idle");
 121                                 frame.Continue = false;
 122                                 fail = false;
 123                         });
 124
 125                         d.BeginInvoke (DispatcherPriority.Normal, (Action) delegate {
 126                                 if (next != 5)
 127                                         throw new Exception ("Expected state 5, got " + next.ToString ());
 128                                 next = 6;
 129                                 Console.WriteLine ("Last normal");
 130                         });
 131
 132                         Dispatcher.PushFrame (frame);
 133
 134                         if (fail)
 135                                 throw new Exception ("Expected all states to run");
 136                 }
 137
 138                 [Test]
 139                 public void TestTwoArguments()
 140                 {
 141                         Dispatcher d = Dispatcher.CurrentDispatcher;
 142                         DispatcherFrame frame = new DispatcherFrame();
 143
 144                         d.BeginInvoke (DispatcherPriority.Normal, (Action<int, string>) delegate(int arg1, string arg2) {
 145                                 Assert.AreEqual(10, arg1, "arg1");
 146                                 Assert.AreEqual("OK", arg2, "arg2");
 147                                 frame.Continue = false;
 148                         }, 10, "OK");
 149
 150                         Dispatcher.PushFrame(frame);
 151                 }
 152
 153                 [Test]
 154                 public void TestRunTwice()
 155                 {
 156                         Dispatcher d = Dispatcher.CurrentDispatcher;
 157                         Action exit = delegate { Dispatcher.ExitAllFrames(); };
 158                         int counter = 0;
 159                         Action increment = delegate { counter++; };
 160
 161                         d.BeginInvoke(DispatcherPriority.Normal, exit);
 162                         Dispatcher.Run();
 163                         d.BeginInvoke(DispatcherPriority.Normal, increment);
 164                         d.BeginInvoke(DispatcherPriority.Normal, increment);
 165                         d.BeginInvoke(DispatcherPriority.Normal, exit);
 166                         Dispatcher.Run();
 167
 168                         Assert.AreEqual(2, counter, "Counter of delegate invocation");
 169                 }
 170
 171                 [Test]
 172                 public void TestStopIfContinueIsFalse()
 173                 {
 174                         Dispatcher d = Dispatcher.CurrentDispatcher;
 175                         DispatcherFrame frame = new DispatcherFrame();
 176                         int counter = 0;
 177
 178                         d.BeginInvoke(DispatcherPriority.Normal, (Action) delegate {
 179                                 counter++;
 180                         });
 181                         d.BeginInvoke(DispatcherPriority.Normal, (Action) delegate {
 182                                 Dispatcher.ExitAllFrames();
 183                         });
 184
 185                         frame.Continue = false;
 186                         Dispatcher.PushFrame(frame);
 187                         Assert.AreEqual(0, counter, "Counter of delegate invocation");
 188                         frame.Continue = true;
 189                         Dispatcher.PushFrame(frame);
 190                         Assert.AreEqual(1, counter, "Counter of delegate invocation");
 191                 }
 192
 193                 //
 194                 // When a Dispatcher exits due to 'frame.Continue' being false,
 195                 // it should not try to deque the same operation second time.
 196                 //
 197                 [Test]
 198                 public void TestOperationDequeue()
 199                 {
 200
 201                         Dispatcher d = Dispatcher.CurrentDispatcher;
 202                         DispatcherFrame frame = new DispatcherFrame();
 203                         Action exit = delegate { frame.Continue = false; };
 204
 205                         d.BeginInvoke(DispatcherPriority.Normal, exit);
 206                         Dispatcher.PushFrame(frame);
 207
 208                         frame = new DispatcherFrame();
 209                         d.BeginInvoke(DispatcherPriority.Background, exit);
 210                         Dispatcher.PushFrame(frame);
 211                 }
 212
 213                 [Test]
 214                 public void TestPreemptedByHigherPriorityTask()
 215                 {
 216                         Dispatcher d = Dispatcher.CurrentDispatcher;
 217                         DispatcherFrame frame = new DispatcherFrame();
 218                         int counter = 0;
 219                         Action increment = delegate { counter++; };
 220
 221                         d.BeginInvoke(DispatcherPriority.Normal, (Action) delegate {
 222                                 d.BeginInvoke(DispatcherPriority.Send, increment);
 223                         });
 224                         d.BeginInvoke(DispatcherPriority.Background, (Action) delegate {
 225                                 frame.Continue = false;
 226                         });
 227
 228                         Dispatcher.PushFrame(frame);
 229                         Assert.AreEqual(1, counter, "Counter of delegate invocation");
 230                 }
 231         }
 232 }
 233
 234