public void TestHotObservable()
{
TestScheduler scheduler = new TestScheduler();
var xs = scheduler.CreateHotObservable (
scheduler.OnNextAt(100, "a"), // only works in Visual Studio
scheduler.OnNextAt(200, "b"),
scheduler.OnCompletedAt<string>(300)
);
var observer = scheduler.CreateObserver<string>();
scheduler.Schedule(TimeSpan.FromTicks(220),
(sched, state) => xs.Subscribe(observer));
scheduler.Start();
observer.Messages.AssertEqual (
new Recorded<Notification<string>>(250, Notification.CreateOnCompleted<string>())
);
}