@Test public void mustBeAbleToUseActorRefSource() throws Exception { final JavaTestKit probe = new JavaTestKit(system); final Source<Integer, ActorRef> actorRefSource = Source.actorRef(10, OverflowStrategy.fail()); final ActorRef ref = actorRefSource .to( Sink.foreach( new Procedure<Integer>() { public void apply(Integer elem) { probe.getRef().tell(elem, ActorRef.noSender()); } })) .run(materializer); ref.tell(1, ActorRef.noSender()); probe.expectMsgEquals(1); ref.tell(2, ActorRef.noSender()); probe.expectMsgEquals(2); }