public void ActorMaterializer_should_properly_shut_down_actors_associated_with_it()
{
var m = Sys.Materializer();
var f = Source.Maybe<int>().RunAggregate(0, (x, y) => x + y, m);
m.Shutdown();
Action action = () => f.Wait(TimeSpan.FromSeconds(3));
action.ShouldThrow<AbruptTerminationException>();
}