public void DispatcherInvokeBasicTest()
{
TestTaskScheduler scheduler = (TestTaskScheduler)ApplicationHost.Current.TaskScheduler;
using (scheduler.DisableImmediateProcessing())
{
Dispatcher dispatcher = Dispatcher.CurrentDispatcher;
int index = 1;
int task1 = 0;
int task2 = 0;
int task3 = 0;
dispatcher.InvokeAsync(() => task3 = index++, (DispatcherPriority)1);
dispatcher.InvokeAsync(() => task1 = index++, (DispatcherPriority)3);
dispatcher.Invoke(() => task2 = index++, (DispatcherPriority)2);
Assert.AreEqual(1, task1);
Assert.AreEqual(2, task2);
Assert.AreEqual(0, task3);
scheduler.ProcessDueOperations();
Assert.AreEqual(1, task1);
Assert.AreEqual(2, task2);
Assert.AreEqual(3, task3);
}
}
public void DispatcherDisableProcessingTest()
{
TestTaskScheduler scheduler = (TestTaskScheduler)ApplicationHost.Current.TaskScheduler;
using (scheduler.DisableImmediateProcessing())
{
Dispatcher dispatcher = Dispatcher.CurrentDispatcher;
int index = 1;
int task1 = 0;
int task2 = 0;
IDisposable dispatcherProcessingDisabled = null;
dispatcher.InvokeAsync(() =>
{
task1 = index++;
dispatcherProcessingDisabled = dispatcher.DisableProcessing();
});
dispatcher.InvokeAsync(() => task2 = index++);
Assert.AreEqual(0, task1);
Assert.AreEqual(0, task2);
Assert.AreEqual(null, dispatcherProcessingDisabled);
scheduler.ProcessDueOperations();
Assert.AreEqual(1, task1);
Assert.AreEqual(0, task2);
Assert.AreNotEqual(null, dispatcherProcessingDisabled);
dispatcherProcessingDisabled.Dispose();
Assert.AreEqual(1, task1);
Assert.AreEqual(0, task2);
scheduler.ProcessDueOperations();
Assert.AreEqual(1, task1);
Assert.AreEqual(2, task2);
}
}