### Question:
UserAction { public void addUser(User user) throws ProceedFailException { userService.addUser(user); }  void addUser(User user); void addUser(String userName, String password); User getUser(int userId); void setUserService(UserService userService);  }### Answer:
@Test public void testAddUser() throws Throwable { getUserAction().addUser(user); }
@Test public void testAddUserByReferenceParameters() throws Throwable { getUserAction().addUser(user); }