当其返回类型为Response Entity时测试控制器类post方法

Question

以下代码说明了使用testng和嘲笑对post方法的测试。我在行assertThat（outputInJson）.isEqualTo（inputInJson）遇到错误。创建要约时，控制器类的post方法返回响应实体对象。

    @Test
public void testCreateOffer() throws Exception {
    Offer offer = new Offer("SE", new Date(), 10);

    MockHttpServletRequest request = new MockHttpServletRequest();
    RequestContextHolder.setRequestAttributes(new ServletRequestAttributes(request));

    URI location = ServletUriComponentsBuilder.fromCurrentRequest().path("/{jobTitle}")
            .buildAndExpand(offer.getJobTitle()).toUri();

    String inputInJson = this.mapToJson(ResponseEntity.created(location).build());
    Mockito.when(offerService.createOffer(Mockito.any(Offer.class))).thenReturn(offer);

    RequestBuilder requestBuilder = MockMvcRequestBuilders.post("/offers").accept(MediaType.APPLICATION_JSON)
            .content(inputInJson).contentType(MediaType.APPLICATION_JSON);

    MvcResult result = mockMvc.perform(requestBuilder).andReturn();

    MockHttpServletResponse response = result.getResponse();

    String outputInJson = response.getContentAsString();

    assertThat(outputInJson).isEqualTo(inputInJson);

    assertThat(response.getStatus()).isEqualTo(HttpStatus.CREATED.value());

}

private String mapToJson(Object object) throws JsonProcessingException {
    ObjectMapper objectMapper = new ObjectMapper();
    return objectMapper.writeValueAsString(object);
}

和控制器类发布方法

@PostMapping("/offers")

public ResponseEntity<Object> createOffer(@Valid @RequestBody Offer offer) {
    Offer uoffer = offerService.createOffer(offer);

    URI location = ServletUriComponentsBuilder.fromCurrentRequest().path("/{jobTitle}")
            .buildAndExpand(uoffer.getJobTitle()).toUri();

    return ResponseEntity.created(location).build();

}