public void ReturnsTrueWhileUntilActionIsInvoked()
{
var timer = new TaskTimerInternal {
Delay = TimeSpan.FromMilliseconds(1)
};
var actionStarted = new ManualResetEventSlim();
var actionCanFinish = new ManualResetEventSlim();
timer.Start(
() => Task.Factory.StartNew(
() =>
{
actionStarted.Set();
actionCanFinish.Wait();
}));
Assert.True(timer.IsStarted);
actionStarted.Wait(50);
Assert.False(timer.IsStarted);
actionCanFinish.Set();
}
public void CancelsPreviousActionWhenStartIsCalledMultipleTimes()
{
var timer = new TaskTimerInternal {
Delay = TimeSpan.FromMilliseconds(1)
};
int invokationCount = 0;
var lastActionInvoked = new ManualResetEventSlim();
timer.Start(() => Task.Factory.StartNew(() => Interlocked.Increment(ref invokationCount)));
timer.Start(
() => Task.Factory.StartNew(
() =>
{
Interlocked.Increment(ref invokationCount);
lastActionInvoked.Set();
}));
Assert.True(lastActionInvoked.Wait(50));
Assert.Equal(1, invokationCount);
}
public void InvokesActionAfterDelay()
{
var timer = new TaskTimerInternal {
Delay = TimeSpan.FromMilliseconds(1)
};
var actionInvoked = new ManualResetEventSlim();
timer.Start(() => Task.Factory.StartNew(actionInvoked.Set));
Assert.False(actionInvoked.IsSet);
Assert.True(actionInvoked.Wait(50));
}
public void HandlesSyncExceptionThrownByTheDelegate()
{
TaskTimerInternal timer = new TaskTimerInternal {
Delay = TimeSpan.FromMilliseconds(1)
};
using (TestEventListener listener = new TestEventListener())
{
listener.EnableEvents(CoreEventSource.Log, EventLevel.LogAlways);
timer.Start(() => { throw new Exception(); });
Assert.NotNull(listener.Messages.FirstOrDefault());
}
}
public async Task AbortsPreviousAction()
{
var timer = new TaskTimerInternal {
Delay = TimeSpan.FromMilliseconds(1)
};
bool actionInvoked = false;
timer.Start(() => Task.Factory.StartNew(() => actionInvoked = true));
timer.Cancel();
await Task.Delay(TimeSpan.FromMilliseconds(20));
Assert.IsFalse(actionInvoked);
}
public void DoesNotLogErrorsIfCallbackReturnsNull()
{
using (TestEventListener listener = new TestEventListener())
{
listener.EnableEvents(CoreEventSource.Log, EventLevel.Error);
var timer = new TaskTimerInternal {
Delay = TimeSpan.FromMilliseconds(1)
};
var actionInvoked = new ManualResetEventSlim();
timer.Start(() => { actionInvoked.Set(); return(null); });
Assert.IsTrue(actionInvoked.Wait(1000));
// Listener will wait for up to 5 seconds for incoming messages so no need to delay/sleep here.
Assert.IsNull(listener.Messages.FirstOrDefault());
}
}
public void DoesNotLogErrorsIfCallbackReturnsNull()
{
using (TestEventListener listener = new TestEventListener())
{
listener.EnableEvents(CoreEventSource.Log, EventLevel.Error);
var timer = new TaskTimerInternal {
Delay = TimeSpan.FromMilliseconds(1)
};
var actionInvoked = new ManualResetEventSlim();
timer.Start(() => { actionInvoked.Set(); return(null); });
Assert.True(actionInvoked.Wait(50));
Thread.Sleep(1000);
Assert.Null(listener.Messages.FirstOrDefault());
}
}