public void Notificator_DoesNotPublishNullValues() =>
new TestScheduler().With(scheduler =>
{
int invokes = 0;
var sut = new Notificator();
(sut as INotificationListener).Notifications.Subscribe(_ => invokes++);
sut.Publish(null);
scheduler.AdvanceBy(1);
Assert.True(invokes == 0);
});