我必须如何调整json路径以便测试成功？

Question

@DisplayName("test getCarportById(), Status OK")
@Test
void testGetCarportLocationById() throws Exception {

    // given
    final String externalId = "123L";

    final CarportLocation carportLocation = CarportLocationMockHelper.createCarportLocationByIdDTO(externalId);

    given(carportService.getCarportLocationToId(externalId.toString())).willReturn(carportLocation);

    // when

    final MvcResult mvcResult = this.mockMvc.perform(getRequestBuilderMockCarportLocationsById(externalId.toString()))
                                            .andExpect(status().isOk())
                                            .andDo(print())
                                            .andExpect(content().contentType("application/json"))
                                            .andExpect(resultMatcherOK)
                                            .andExpect(MockMvcResultMatchers.jsonPath("$.externalId")
                                                                            .value(CarportLocation.getExternalId()))
                                            .andReturn();

    // then

    assertEquals("application/json", mvcResult.getResponse()
                                              .getContentType());
}

public static CarportLocation createCarportLocationByIdDTO(String externalId) {

    finalCarportLocation carportLocation = new CarportLocation();
    carportLocation.setId(123456L);
    carportLocation.setExternalId(externalId);
    carportLocation.setCarportName("Carport1");
    carportLocation.setLocX(12.4534);
    carportLocation.setLocY(19.5678);
    carportLocation.setLocZ(25.0);

    return carportLocation;
}

这是我通过。anddo（print（））打印出来的表达式：

MockHttpServletRequest:
      HTTP Method = GET
      Request URI = /carport/carports/filter
       Parameters = {carportNameAndExternalId=[123L]}
          Headers = []
             Body = <no character encoding set>
    Session Attrs = {}

Handler:
             Type = controller.CarportController
           Method = controller.CarportController#_getCarportLocationsByIdAndName(String)

Async:
    Async started = false
     Async result = null

Resolved Exception:
             Type = null

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

FlashMap:
       Attributes = null

MockHttpServletResponse:
           Status = 200
    Error message = null
          Headers = [Content-Type:"application/json"]
     Content type = application/json
             Body = []
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

只是不幸的是，我的JUnit测试失败了，我不知道为什么。

AssertionError：JSON路径“$.ExternalID”处没有值

只是不幸的是，一个“$[1].ExternalID”对我没有帮助。因此，anddo(print())方法也有，但不能真正处理输出。有人知道我必须如何调整json路径以便测试成功吗？

Answer 1

assertEquals("application/json", mvcResult.getResponse()
                                          .getContentType());

MockHttpServletResponse:
           Status = 200
    Error message = null
          Headers = [Content-Type:"application/json"]
     Content type = application/json
             Body = []
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

.andExpect(jsonPath("$.externalId", is(CarportLocation.getExternalId())))