Junit 模拟测试响应空白正文

Question

好吧，我在测试使用@ModelAttribute 的端点时遇到问题我不太清楚如何使用此注释进行测试，并且测试响应在 MockHttpServletResponse 中始终是一个空主体，但状态很好...

这里是控制器方法：

@PostMapping(consumes = MediaType.MULTIPART_FORM_DATA_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<?> createTestimonials(@ModelAttribute(name = "testimonialsCreationDto") @Valid TestimonialsCreationDto testimonialsCreationDto) {
    try {
             return ResponseEntity.status(HttpStatus.CREATED).body(iTestimonials.createTestimonials(testimonialsCreationDto));
        } catch (Exception e) {
            return ResponseEntity.status(HttpStatus.CONFLICT).body(e.getMessage());
    }
}

我的 dtos

@Getter @Setter @EqualsAndHashCode
public class TestimonialsCreationDto implements Serializable {
    private static final long serialVersionUID = 1L;
    @NotBlank(message = "{testimonials.error.empty.name}")
    private String name;
    private MultipartFile image;
    private String content;
}

@JsonInclude(JsonInclude.Include.NON_DEFAULT)
public interface TestimonialsResponseDto {
    Long getId();
    String getName();
    String getImage();
    String getContent();
    Date getCreated();
    Date getEdited();
    Boolean getDeleted();
}

我的测试课

@Test
    void createTestimonials() throws Exception {
        //Given
        String name = "Testimonio 159";
        String contentTestimonial = name + " content!";
        Testimonials testimonials = new Testimonials();
        testimonials.setId(123L);
        testimonials.setName(name);
        testimonials.setContent(contentTestimonial);
        TestimonialsCreationDto testimonialsCreationDto = modelMapper.map(testimonials, TestimonialsCreationDto.class);
        TestimonialsResponseDto testimonialsResponseDto = projectionFactory.createProjection(TestimonialsResponseDto.class, testimonialsCreationDto);
        Mockito.when(testimonialsService.createTestimonials(Mockito.any(TestimonialsCreationDto.class))).thenReturn(Mockito.any(TestimonialsResponseDto.class));
        //When
        mockMvc.perform(post("/testimonials")
                .contentType(MediaType.MULTIPART_FORM_DATA)
                .flashAttr("testimonialsCreationDto", testimonialsCreationDto)
                .content(objectMapper.writeValueAsString(testimonialsCreationDto))
                .characterEncoding("UTF-8"))
        //Then
                .andExpect(status().isCreated())
                .andExpect(jsonPath("$.name", is(name)))
                .andExpect(jsonPath("$.content", is(contentTestimonial)));
        verify(testimonialsService).createTestimonials(isA(TestimonialsCreationDto.class));
    }

测试响应

MockHttpServletRequest:
      HTTP Method = POST
      Request URI = /testimonials
       Parameters = {}
          Headers = [Content-Type:"multipart/form-data;charset=UTF-8", Content-Length:"74"]
             Body = {"name":"Testimonio 159","image":null,"content":"Testimonio 159 content!"}
    Session Attrs = {}

MockHttpServletResponse:
           Status = 201
    Error message = null
          Headers = []
     Content type = null
             Body = 
    Forwarded URL = null
   Redirected URL = null
          Cookies = []

Answer 1

我猜问题出在这一行，您在其中模拟了 TestimonialService 的行为：

Mockito.when(testimonialsService.createTestimonials(Mockito.any(TestimonialsCreationDto.class))).thenReturn(Mockito.any(TestimonialsResponseDto.class));

thenReturn() 部分在我看来是错误的。我希望您的模拟应该返回一个具体的TestimonialsResponseDto 对象。 你可以试试这样的：

when(testimonialsService.createTestimonials(any(TestimonialsCreationDto.class))).then(returnsFirstArg());

通过此设置，您的存储库将始终返回传递给它的 testimonialsService.createTestimonials(Mockito.any(TestimonialsCreationDto.class))。

编辑 也许您想返回未在任何地方的代码中使用的testimonialsResponseDto？

when(testimonialsService.createTestimonials(any(TestimonialsCreationDto.class))).then(testimonialsResponseDto);

如果您需要有关如何使用 @WebMvcTest 的示例，也许您会发现 this blog post of mine 很有帮助:)