public void testOne() {
TestActorRef<TickTock> actorRef = TestActorRef.apply(new Props(
TickTock.class), _system);
// get access to the underlying actor object
TickTock actor = actorRef.underlyingActor();
// access the methods the actor object and directly pass arguments and
// test
actor.tock(new Tock("tock something"));
Assert.assertTrue(actor.state);
}