Spring 引导中 GET 请求的 MockMvc 结果 returns null

Question

我在测试 Spring 引导控制器时遇到问题。我正在尝试测试 Controller put 方法之一，但我得到的只是 Status expected:<200> but was:<400> 错误消息。

我的控制器：

@PutMapping(value = "/update", produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<String> updateFields(@RequestBody List<UpdateModel> model) throws JsonProcessingException {
    return new ResponseEntity<>(vaultService.updateFields(model), HttpStatus.OK);
}

我的控制器测试： URL 没问题，我有一个列表，就像我控制器中的 get 方法一样。

@Test
void updateFieldsTest() throws Exception {
    List<UpdateModel> response = new ArrayList<>();
    UpdateModel updateModel = new UpdateModel();
    response.add(updateModel);
    when(vaultService.updateFields(anyList()))
            .thenReturn(String.valueOf(response));

mockMvc.perform(
        MockMvcRequestBuilders.put("/api/update")
        .contentType(MediaType.APPLICATION_JSON_VALUE)
        .accept("application/json"))
        .andExpect(MockMvcResultMatchers.status().isOk());
}

这是一条错误消息：

MockHttpServletRequest:
      HTTP Method = PUT
      Request URI = /api/update
       Parameters = {}
          Headers = [Content-Type:"application/json;charset=UTF-8", Accept:"application/json"]
             Body = null
    Session Attrs = {}

Handler:
             Type = hr.ogcs.ltt.api.lttapi.controller.LttController
           Method = hr.ogcs.ltt.api.lttapi.controller.LttController#updateFields(List)

Async:
    Async started = false
     Async result = null

Resolved Exception:
             Type = org.springframework.http.converter.HttpMessageNotReadableException

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

FlashMap:
       Attributes = null

MockHttpServletResponse:
           Status = 400
    Error message = null
          Headers = [Vary:"Origin", "Access-Control-Request-Method", "Access-Control-Request-Headers"]
     Content type = null
             Body = 
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

Status expected:<200> but was:<400>
Expected :200
Actual   :400
<Click to see difference>
java.lang.AssertionError: Status expected:<200> but was:<400>
    at org.springframework.test.util.AssertionErrors.fail(AssertionErrors.java:59)
    at org.springframework.test.util.AssertionErrors.assertEquals(AssertionErrors.java:122)
    at org.springframework.test.web.servlet.result.StatusResultMatchers.lambda$matcher(StatusResultMatchers.java:627)
    at org.springframework.test.web.servlet.MockMvc.andExpect(MockMvc.java:212)
   at hr.ogcs.ltt.api.apicontroller.ControllerTest.updateFieldsTest(ControllerTest.java:113) <31 internal lines>
   at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)<9 internal lines>
   at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)<48 internal lines>

我猜它必须与发送必需的参数有关，但我不确定究竟是什么导致了这个 400 错误。

Answer 1

您的请求中没有内容

mockMvc.perform(
        MockMvcRequestBuilders.put("/api/update")
        .contentType(MediaType.APPLICATION_JSON_VALUE)
        .content(jsonString)
        .accept("application/json"))
        .andExpect(MockMvcResultMatchers.status().isOk());
}

Answer 2

对于任何感兴趣的人，我已经设法找到了解决方案，所以就在这里。

@Test
@DisplayName("Test updateFieldsTest")
void updateFieldsTest() throws Exception {
    List<UpdateModel> response = new ArrayList<>();
    UpdateModel updateModel = new UpdateModel();
    response.add(updateModel);
    when(vaultService.updateFields(anyList()))
            .thenReturn(String.valueOf(response));

ObjectMapper objectMapper = new ObjectMapper();
String json = objectMapper.writeValueAsString(response);

mockMvc.perform(
        MockMvcRequestBuilders.put("/api/update")
        .contentType(MediaType.APPLICATION_JSON_VALUE)
        .content(json)
        .accept("application/json"))
        .andExpect(MockMvcResultMatchers.status().isOk());
}

如果将此代码与我原来的 post 中的代码进行比较，区别在于添加了 ObjectMapper.

Spring 引导中 GET 请求的 MockMvc 结果 returns null

MockMvc result returns null for GET request in Spring Boot

spring-boot

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junit5