public void SubjectDeliversData()
{
var subject = new EventFlowSubject <int>();
var obs1 = new Mock <IObserver <int> >();
var obs2 = new Mock <IObserver <int> >();
var s1 = subject.Subscribe(obs1.Object);
var s2 = subject.Subscribe(obs2.Object);
subject.OnNext(7);
s2.Dispose();
subject.OnNext(8);
subject.OnCompleted();
subject.OnNext(9);
subject.Dispose();
subject.OnNext(10);
obs1.Verify(o => o.OnNext(It.IsAny <int>()), Times.Exactly(2));
obs1.Verify(o => o.OnNext(It.Is <int>(i => i == 7)), Times.Exactly(1));
obs1.Verify(o => o.OnNext(It.Is <int>(i => i == 8)), Times.Exactly(1));
obs1.Verify(o => o.OnCompleted(), Times.Exactly(1));
obs1.Verify(o => o.OnError(It.IsAny <Exception>()), Times.Exactly(0));
obs2.Verify(o => o.OnNext(It.IsAny <int>()), Times.Exactly(1));
obs1.Verify(o => o.OnNext(It.Is <int>(i => i == 7)), Times.Exactly(1));
obs1.Verify(o => o.OnCompleted(), Times.Exactly(1));
obs1.Verify(o => o.OnError(It.IsAny <Exception>()), Times.Exactly(0));
}
public async Task SubjectWaitsOnSlowObservers()
{
// Use shutdown timeout long enough to be "infinite" from the test standpoint,
// but short enough for the test run to finish in reasonable time
// in case something goes seriously wrong.
var ShutdownTimeout = TimeSpan.FromMinutes(15);
var subject = new EventFlowSubject <int>(ShutdownTimeout);
var observer = new SlowObserver <int>();
subject.Subscribe(observer);
var nextDataTask = Task.Run(() => subject.OnNext(0));
Assert.True(observer.OnNextStartedEvent.WaitOne(TimeSpan.FromSeconds(5)), "Five seconds should be plenty to start the OnNext() task");
var completionTask = Task.Run(() => subject.OnCompleted());
await Task.WhenAll(nextDataTask, completionTask);
Assert.True(observer.OnNextExitTimestamp != DateTime.MinValue, "OnNext() was never called!");
Assert.True(observer.OnCompletedEntryTimestamp != DateTime.MinValue, "OnCompleted was never called");
Assert.True(observer.OnCompletedEntryTimestamp >= observer.OnNextExitTimestamp, "OnCompleted() should not have been called when OnNext() was in progress");
}
