java - Spring 5.0.0 MockMvc:即使设置了正确的MediaType，也不支持的媒体类型

我将JUnit4与Spring Web MVC Test结合使用，并且具有Controller的测试类。

控制器处理POST请求以使用JSON正文内容“ /测试”。我已经使用Postman手动测试了此方法，并且由于预期的“ name”属性为空，因此收到了400错误的请求响应，正如预期的那样。

POST /Server/test HTTP/1.1
Host: localhost:8080
Content-Type: application/json
Cache-Control: no-cache

{
    "name": ""
}

但是，当我通过测试类向控制器发送相同的请求时，即使请求相同，也会收到415（不支持的媒体类型）错误。

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
@WebAppConfiguration
public class MyControllerTest {

@Configuration
public static class MyControllerTestConfiguration {

    @Bean
    public MyController myController() {
        return new MyController();
    }
}

private MockMvc mockMvc;

@Before
public void setup() {
    mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
}

@Test
public void shouldReturnBadRequest_IfBodyIsEmpty() throws Exception {
    // Works fine
    mockMvc.perform(post("/test"))
           .andExpect(status().isBadRequest());
}

@Test
public void shouldReturnBadRequest_IfInvalidFields() throws Exception {

    MyDTO dto = new MyDTO();
    dto.setName("");

    // Jackson object mapper
    ObjectMapper mapper = new ObjectMapper();

    // TEST FAIL: Gets 415 error
    mockMvc.perform(
                post("/test")
                .content(mapper.writeValueAsString(dto))
                .characterEncoding("UTF-8")
                .contentType(MediaType.APPLICATION_JSON)
            )
            .andDo(print())
            .andExpect(status().isBadRequest());
    }
}

这是MyController。

@RestController
@EnableWebMvc
public class MyController {

    @RequestMapping(value = "/test", method = RequestMethod.POST)
    public void init(@javax.validation.Valid @RequestBody MyDTO dto) {
    }

    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ResponseBody
    public void validationError(MethodArgumentNotValidException ex) {
    }
}

这是MyDTO。

@lombok.Data
public class MyDTO {
    private String name;
}

我的依赖项中也有Jackson。

这是将测试类的请求打印到控制台后的样子：

MockHttpServletRequest:
      HTTP Method = POST
      Request URI = /test
       Parameters = {}
          Headers = {Content-Type=[application/json;charset=UTF-8]}
             Body = {"name":""}
    Session Attrs = {}

Handler:
             Type = controller.MyController
           Method = public void controller.MyController.init(dto.MyDTO)

Async:
    Async started = false
     Async result = null

Resolved Exception:
             Type = org.springframework.web.HttpMediaTypeNotSupportedException

ModelAndView:
        View name = null
             View = null
            Model = null

FlashMap:
       Attributes = null

MockHttpServletResponse:
           Status = 415
    Error message = null
          Headers = {Accept=[application/octet-stream, text/plain, application/xml, text/xml, application/x-www-form-urlencoded, application/*+xml, multipart/form-data, */*]}
     Content type = null
             Body =
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

无论如何，为什么我会得到这个错误？该请求对我来说似乎很好。任何帮助表示赞赏。谢谢。

最佳答案

我已经通过使用@EnableWebMvc注释MyControllerTestConfiguration内部静态类解决了该问题。

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
@WebAppConfiguration
public class MyControllerTest {

    @Configuration
    @EnableWebMvc // <------------ added this
    public static class MyControllerTestConfiguration {

        @Bean
        public SetupController setupController() {
            return new MyController();
        }

    }