招聘导师：Java/Spring Boot单元测试专家

Mockito 测试就是为了代码间解耦！如果开发过程发下自己的代码要调用别人代码或者数据！这里就可以使用Mockito来解决耦合问题！还有未实现的接口都可以使借用Mockito来测试！

    @Test
    @Order(1)
    void When_CreateUser_Will_Be_Return_User_Object() {
        Mockito.when(userRepository.save(any(User.class))).thenReturn(true);
        User user = userService.createUser(firstName,
            lastName,
            email,
            passwd,
            repeatPasswd
        );

        assertNotNull(user, "The createUser() should not have returned null");
        assertEquals(firstName, user.getFirstName(), "User's first name is incorrect.");
        assertEquals(lastName, user.getLastName(), "User's last name is incorrect.");
        assertEquals(email, user.getEmail(), "User's email is incorrect.");

        assertNotNull(user.getId(), "User id is missing.");
        Mockito.verify(userRepository).save(any(User.class));
    }