@Before
 public void testSetup() throws Exception {
   sender = new User();
   sender.setName("bill");
   receiver = new User();
   receiver.setName("jack");
   mail = new Mail();
   mail.setRead(false);
   mail.setTitle("aa");
   mail.setContent("bb");
   userAPI = new UserAPI("localhost", "8888", "service");
   mailAPI = new MailAPI("localhost", "8888", "service");
   APIResponse response = userAPI.create(sender);
   if (response.isDone()) {
     sender = (User) response.getMessage();
     assertEquals("bill", sender.getName());
   } else {
     logger.log(Level.SEVERE, response.getMessage().toString());
   }
   response = userAPI.create(receiver);
   if (response.isDone()) {
     receiver = (User) response.getMessage();
     assertEquals("jack", receiver.getName());
   } else {
     logger.log(Level.SEVERE, response.getMessage().toString());
   }
   mail.setSender(sender);
   mail.setReceiver(receiver);
 }