public void SwitchOffMainThreadAsync_CanceledMidSwitch()
{
using (CancellationTokenSource cts = new CancellationTokenSource())
{
AsynchronityUtilities.TaskSchedulerAwaiter awaitable = AsynchronityUtilities.SwitchOffMainThreadAsync(cts.Token);
AsynchronityUtilities.TaskSchedulerAwaiter awaiter = awaitable.GetAwaiter();
cts.Cancel();
try
{
awaiter.GetResult();
Assert.Fail("Expected OperationCanceledException not thrown.");
}
catch (OperationCanceledException ex)
{
Assert.AreEqual(cts.Token, ex.CancellationToken);
}
}
}
public void SwitchOffMainThreadAsync_OffMainThread()
{
AsynchronityUtilities.TaskSchedulerAwaiter awaitable = AsynchronityUtilities.SwitchOffMainThreadAsync(CancellationToken.None);
AsynchronityUtilities.TaskSchedulerAwaiter awaiter = awaitable.GetAwaiter();
Assert.IsTrue(awaiter.IsCompleted); // guarantees the caller wouldn't have switched threads.
}