### Question:
Emailer { public void sendByeByeEmailTo(User user) { RealEmailSender.sendEmailTo(user.email,"bye"); }  void sendGreetingEmailTo(User user); void sendByeByeEmailTo(User user);  }### Answer:
@Test public void shouldSendUnsubscribeEmailAndNotifyAdminAboutUserLeaving() throws Exception { new Emailer().sendByeByeEmailTo(aUser("email@gmail.com","User")); }