java - MockHttpServletResponse 主体为空

Question

我尝试在我的 Controller 中测试我的方法 addPerson()，但是当我执行测试时，我在 MockHttpServletResponse 中有一个空主体的状态 200。我想用 MockMvcResultMatchers 中的 jsonPath 测试主体响应，但主体为空时无法执行此操作。

这是我的测试:

@WebMvcTest(PersonController.class)
@ExtendWith(SpringExtension.class)
public class PersonControllerTest {

    @Autowired
    private MockMvc mvc;

    @Autowired
    private Model model;

    @MockBean
    private PersonService service;

     @Test
     public void addPersonTest() throws Exception {
        this.mvc.perform(post("/person/add")
            .contentType(MediaType.APPLICATION_JSON).content("{\"firstName\": \"Test\",\"lastName\": \"\",\"address\": \"\",\"city\": \"\",\"zip\": \"\",\"phone\": \"\",\"email\": \"\"}"))
            .andDo(MockMvcResultHandlers.print())
            .andExpect(status().isOk());
     }

这是我的 Controller ，方法是 addPerson()

@RequestMapping("/person")
@RestController
public class PersonController {

    @Autowired
    Model model;

    private static final Logger logger = LogManager.getRootLogger();

    @Autowired
    private PersonService personService;

    @GetMapping("/")
    public List<Person> allPerson() {
        return personService.all();
    }

    @PostMapping("/add")
    public List<Person> addPerson(@RequestBody Person person) {
        List<Person> listPerson = this.personService.add(person);

        logger.info("Request = @RequestBody = {}", person);
        logger.info("Response {}", listPerson);
        return listPerson;
    }

这是服务:

@Service
public class PersonService {

    @Autowired
    private Model model;

    public PersonService(Model model2) {
         this.model = model2;
    }

    public List<Person> add(Person person) {
        List<Person> listPersons = model.getPersons();
        listPersons.add(person);
        return listPersons;
    }

感谢您的帮助。

Answer 1

当您模拟 PersonService 时，您必须提供它的行为，否则它总是返回 null。为此，您可以使用 Mockito 中的 when().thenReturn():

@WebMvcTest(PersonController.class)
@ExtendWith(SpringExtension.class)
public class PersonControllerTest {

    @Autowired
    private MockMvc mvc;

    @Autowired
    private Model model;

    @MockBean
    private PersonService service;


     @Test
     public void addPersonTest() throws Exception {

           List<Person> personList = Arrays.asList(new Person()); // create list here
           when(service.add(any(Person.class)).thenReturn(personList); // mock the behaviour of your PersonService bean

           this.mvc.perform(post("/person/add")
            .contentType(MediaType.APPLICATION_JSON).content("{\"firstName\": \"Test\",\"lastName\": \"\",\"address\": \"\",\"city\": \"\",\"zip\": \"\",\"phone\": \"\",\"email\": \"\"}"))
            .andDo(MockMvcResultHandlers.print())
                    .andExpect(status().isOk());
     }
}