public void A_ActorRefSource_must_emit_received_messages_to_the_stream()
{
var s = TestSubscriber.CreateManualProbe<int>(this);
var actorRef = Source.ActorRef<int>(10, OverflowStrategy.Fail)
.To(Sink.FromSubscriber(s))
.Run(Materializer);
var sub = s.ExpectSubscription();
sub.Request(2);
actorRef.Tell(1);
s.ExpectNext(1);
actorRef.Tell(2);
s.ExpectNext(2);
actorRef.Tell(3);
s.ExpectNoMsg(TimeSpan.FromMilliseconds(500));
}