@Test
public void sendingServeCoffeeShouldResultInCoffeeServedResponse() {

    new JavaTestKit(system) {{
        ActorRef waiter = system.actorOf(Waiter.props());
        waiter.tell(new Waiter.ServeCoffee(new Coffee.Akkaccino()), getRef());
        expectMsgEquals(new Waiter.CoffeeServed(new Coffee.Akkaccino()));
    }};
}