public void TestFlush()
{
var countdownEvent = new CountdownEvent(2);
var eventDispatcher = new TestEventDispatcher(countdownEvent);
SetEventProcessor(eventDispatcher);
UserEvent userEvent = BuildConversionEvent(EventName);
EventProcessor.Process(userEvent);
EventProcessor.Flush();
eventDispatcher.ExpectConversion(EventName, TestUserId);
EventProcessor.Process(userEvent);
EventProcessor.Flush();
eventDispatcher.ExpectConversion(EventName, TestUserId);
Thread.Sleep(1500);
Assert.True(eventDispatcher.CompareEvents());
Assert.True(countdownEvent.Wait(TimeSpan.FromMilliseconds(MAX_DURATION_MS / 2)), "Exceeded timeout waiting for notification.");
Assert.AreEqual(0, EventProcessor.EventQueue.Count);
}