private static bool EnlistWithSyncContext_BeforeCancel_ThrowingExceptionInSyncContextDelegate_ThrowOnFirst()
{
TestHarness.TestLog("* CancellationTokenTests.EnlistWithSyncContext_BeforeCancel_ThrowingExceptionInSyncContextDelegate()");
bool passed = true;
ManualResetEventSlim mres_CancelHasBeenEnacted = new ManualResetEventSlim(); //synchronization helper
CancellationTokenSource tokenSource = new CancellationTokenSource();
CancellationToken token = tokenSource.Token;
// Install a SynchronizationContext...
SynchronizationContext prevailingSyncCtx = SynchronizationContext.Current;
TestingSynchronizationContext testContext = new TestingSynchronizationContext();
SynchronizationContext.SetSynchronizationContext(testContext);
// Main test body
ApplicationException caughtException = null;
// register a null delegate, but use the currently registered syncContext.
// the testSyncContext will track that it was used when the delegate is invoked.
token.Register(() => { throw new ApplicationException(); }, true);
ThreadPool.QueueUserWorkItem(
(state) =>
{
try
{
tokenSource.Cancel(true);
}
catch (ApplicationException ex)
{
caughtException = ex;
}
mres_CancelHasBeenEnacted.Set();
}
);
mres_CancelHasBeenEnacted.Wait();
passed &= TestHarnessAssert.IsTrue(testContext.DidSendOccur, "the delegate should have been called via Send to SyncContext.");
passed &= TestHarnessAssert.IsNotNull(caughtException, "An ApplicationException should be thrown.");
//Cleanup
SynchronizationContext.SetSynchronizationContext(prevailingSyncCtx);
return passed;
}
private static bool EnlistWithSyncContext_BeforeCancel()
{
TestHarness.TestLog("* CancellationTokenTests.EnlistWithSyncContext_BeforeCancel()");
bool passed = true;
ManualResetEventSlim mres_CancelHasBeenEnacted = new ManualResetEventSlim(); //synchronization helper
CancellationTokenSource tokenSource = new CancellationTokenSource();
CancellationToken token = tokenSource.Token;
// Install a SynchronizationContext...
TestingSynchronizationContext testContext = new TestingSynchronizationContext();
SynchronizationContext.SetSynchronizationContext(testContext);
// Main test body
// register a null delegate, but use the currently registered syncContext.
// the testSyncContext will track that it was used when the delegate is invoked.
token.Register(() =>{}, true);
ThreadPool.QueueUserWorkItem(
(state) =>
{
tokenSource.Cancel();
mres_CancelHasBeenEnacted.Set();
}
);
mres_CancelHasBeenEnacted.Wait();
passed &= TestHarnessAssert.IsTrue(testContext.DidSendOccur, "the delegate should have been called via Send to SyncContext.");
return passed;
}