java – 单元测试Spring RESTful控制器时“内容类型未设置”

我有一个类似于这个的Rest控制器：

@RestController
public class UserRestController {
    @Autowired
    private UserService userService;
    @RequestMapping(value = "/user/activate",method = RequestMethod.POST)
    public ResponseEntityrequired = true) final String email,@RequestParam(required = true) final String key) {
        UserDTO userDTO = userService.activateAccount(email,key);
        return new ResponseEntity


当我使用Postman调用它并且我不发送’key’参数时,我收到此JSON消息：

{
    "timestamp": 1446211575193,"status": 400,"error": "Bad Request","exception": "org.springframework.web.bind.MissingServletRequestParameterException","message": "required String parameter 'key' is not present","path": "/user/activate"
}
另一方面,我正在使用JUnit和MockMVC Spring实用程序测试此方法.

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = ApplicationConfig.class)
@WebAppConfiguration
public class UserRestControllerTest {
    private static MockMvc mockMvc;
    @Mock
    private UserService userService;
    @InjectMocks
    private UserRestController userRestController;
    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
        mockMvc = MockMvcBuilders
                .standaloneSetup(userRestController)
                .setMessageConverters(
                        new MappingJackson2HttpMessageConverter(),new Jaxb2RootElementHttpMessageConverter()).build();
    }
    @Test
    public void testActivaterequiredParams() throws Exception {
        mockMvc.perform(
                MockMvcRequestBuilders.post("/user/activate")
                .contentType(MediaType.APPLICATION_FORM_URLENCODED)
                .accept(MediaType.APPLICATION_JSON))
                .andDo(MockMvcResultHandlers.print())
                .andExpect(MockMvcResultMatchers.status().isBadRequest())
                .andExpect(
                        MockMvcResultMatchers.content().contentType(
                                UtilsUnitTest.APPLICATION_JSON_UTF8))
                .andExpect(
                        jsonPath(
                                "message",is("required String parameter 'email' is not present")));
     }
}
但是当我执行此测试时,我注意到响应不是JSON消息.事实上,我得到一个例外：


java.lang.AssertionError: Content type not set

特别是,完成的结果是

MockHttpServletRequest:
         HTTP Method = POST
         Request URI = /user/activate
          Parameters = {}
             Headers = {Content-Type=[application/x-www-form-urlencoded]}
             Handler:
                Type = com.company.controller.UserRestController
              Method = public org.springframework.http.ResponseEntityrequired String parameter 'email' is not present
             Headers = {}
        Content type = null
                Body = 
       Forwarded URL = null
      Redirected URL = null
             Cookies = []
我推断当抛出异常时,这不会转换为JSON格式(当我发送电子邮件和关键参数时,我得到了正确的JSON结果)
问题很明显：如果抛出异常,我应该在单元测试配置中更改什么来获取JSON错误消息？


最佳答案
问题是在断言失败后测试停止：

.andExpect(MockMvcResultMatchers.content().contentType(UtilsUnitTest.APPLICATION_JSON_UTF8))
除此之外,jsonPath(“message”…不会点击任何内容.要验证返回的错误消息,请使用MockMvcResultMatchers.status().reason(< ResultMatcher>).
以下测试应该完成这项工作：

@Test
public void testActivaterequiredParams() throws Exception {
    final ResultActions result = mockMvc
            .perform(MockMvcRequestBuilders.post("/user/activate")
                    .contentType(MediaType.APPLICATION_FORM_URLENCODED).accept(MediaType.APPLICATION_JSON))
            .andDo(MockMvcResultHandlers.print());
    result.andExpect(MockMvcResultMatchers.status().isBadRequest());
    result.andExpect(MockMvcResultMatchers.status().reason(is("required String parameter 'email' is not present")));
}
但是考虑一下这个(测试错误信息)是不是一个好主意,也许看看this discussion.

java – 单元测试Spring RESTful控制器时“内容类型未设置”

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