p.initialize(mailbox);
c = publish.send(future, p);
assertEquals(0, c);
(new Subscribe(s)).send(future, p);
GetSubscriber getSubscriber = new GetSubscriber("foo");
Subscriber s1 = getSubscriber.send(future, p);
assertEquals(s, s1);
c = publish.send(future, p);
assertEquals(1, c);
(new Unsubscribe(s)).send(future, p);
c = publish.send(future, p);