@Test public void shouldImplementComparable() { ActorRef ref1 = system.actorOf(TrivialActor.class); ActorRef ref2 = system.actorOf(TrivialActor.class); Assert.assertNotEquals( "Two references must appear as different using the compareTo method", 0, ref1.compareTo(ref2)); Assert.assertEquals( "A reference must be equal to itself according to compareTo method", 0, ref1.compareTo(ref1)); }
@Override public int compareTo(ActorRef o) { return reference.compareTo(o); }