public void ActorSubscriber_should_signal_error()
{
var e = new SystemException("simulated");
var actorRef = Source.FromEnumerator<int>(() => { throw e; })
.RunWith(Sink.ActorSubscriber<int>(ManualSubscriber.Props(TestActor)), Sys.Materializer());
actorRef.Tell("ready");
ExpectMsg<OnError>().Cause.Should().Be(e);
}