public void KeepAlive_must_work_if_timer_fires_before_initial_request()
{
var upstream = TestPublisher.CreateProbe<int>(this);
var downstream = TestSubscriber.CreateProbe<int>(this);
Source.FromPublisher(upstream)
.KeepAlive(TimeSpan.FromSeconds(1), () => 0)
.RunWith(Sink.FromSubscriber(downstream), Materializer);
downstream.EnsureSubscription();
downstream.ExpectNoMsg(TimeSpan.FromSeconds(1.5));
downstream.Request(1);
downstream.ExpectNext(0);
upstream.SendComplete();
downstream.ExpectComplete();
}