我正在尝试测试 get 方法，但不幸的是我收到此错误:

org.springframework.web.util.NestedServletException:请求处理失败；嵌套异常是java.lang.NullPointerException

我是新手，我真的不知道我做错了什么。我自动连线，所以我看不出问题出在哪里:

@RestController 
public class RegisterController { 
 
 
@Autowired 
private UserService userService; 
@Autowired 
private SmtpMailSender smtpMailSender; 
@Autowired 
private ConfirmEmailServiceImpl confirmEmailService; 
 
@RequestMapping(value="/register/validate",method = RequestMethod.GET) 
public ResponseEntity<String> checkEmailCode(String email,String code) { 
 
    ConfirmEmail confirmEmail=new ConfirmEmail(); 
    confirmEmail=confirmEmailService.findEmail(email); 
    if(confirmEmail!=null && confirmEmail.getCode().compareTo(code)==0) { 
            User user=userService.findByEmail(email); 
            user.setActive(true); 
            userService.save(user); 
            return new ResponseEntity<String>("Correct",HttpStatus.OK); 
        } 
        else 
            return  new ResponseEntity<String>("Wrong",HttpStatus.valueOf("Wrong code")); 
 
} 
 
 
 
 
} 
 
 
 
 
public class RegisterControllerTest { 
@InjectMocks 
private RegisterController controller; 
 
private MockMvc mockMvc; 
 
@Before 
public void setup(){ 
 
    MockitoAnnotations.initMocks(this); 
 
    mockMvc = MockMvcBuilders.standaloneSetup(controller).build(); 
} 
 
@Test 
public void test() throws Exception { 
 
    mockMvc.perform(get("/register/validate")).andDo(print()); 
 
} 

}

当我尝试运行测试时出现错误

请您参考如下方法:

来自 Spring Boot 文档

@RunWith(SpringRunner.class) 
@SpringBootTest 
@Import(MyTestsConfiguration.class) 
public class MyTests { 
 
@Test 
public void exampleTest() { 
    ... 
} 
 
} 

https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-testing.html

你尝试过这样的事情吗？