public void testUpdate() {
   OtherUserService service = new OtherUserService(this.getContext());
   User u = service.find(2);
   System.out.println("before update:" + u);
   u.setUsername("hehe~");
   service.update(u);
   u = service.find(2);
   System.out.println("after update:" + u);
 }
 public void testFindUser() {
   OtherUserService service = new OtherUserService(this.getContext());
   User user = service.find(2);
   System.out.println(user);
 }