我有一个控制器，我正在编写测试。一切似乎都编译得很好，但后来我得到了一个运行时错误，说下面的话。我不记得我把我的DTO转换为字符串的任何地方。堆栈跟踪显示，这个“ResultActions response = mockMvc.perform（post（“/app/API/agency/signup”）.contentType（MediaType.APPLICATION_JSON）.content（mapper.writeValueAsString（agency））”是有问题的一行，但我不确定原因。

Request processing failed; nested exception is java.lang.ClassCastException: class com.zshift.io.dto.records.AgencyDTORecord cannot be cast to class java.lang.String (com.zshift.io.dto.records.AgencyDTORecord is in unnamed module of loader 'app'; java.lang.String is in module java.base of loader 'bootstrap')
org.springframework.web.util.NestedServletException
    at com.zshift.io.tests.agency.AgencyIntegrationTest.testAgencySignup(AgencyIntegrationTest.java:77)
Caused by: java.lang.ClassCastException: class com.zshift.io.dto.records.AgencyDTORecord cannot be cast to class java.lang.String (com.zshift.io.dto.records.AgencyDTORecord is in unnamed module of loader 'app'; java.lang.String is in module java.base of loader 'bootstrap')
    at com.zshift.io.tests.agency.AgencyIntegrationTest.testAgencySignup(AgencyIntegrationTest.java:77)

控制器看起来像这样。

@PostMapping(path = "/signup", produces = { MediaType.APPLICATION_JSON }, consumes = { MediaType.APPLICATION_JSON })
    public ResponseEntity addAgency(@RequestBody AgencyDTORecord record) throws AlreadyExistsException {
        return new ResponseEntity<>(service.saveAgency(record), HttpStatus.CREATED);
    }

我的DTO类看起来像这样

@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@Data
@Entity
public class AgencyDTORecord {
    
    private String agencyAbout;
    private String agencyAddress;
    private String agencyEmail;
    private String agencyLocation;
    private String agencyName;
    private String agencyPhone;
    private String agencyLatitude;
    private String agencyLongitude;
    private String agencySecret;
    private String agencyPostCode;
    private Long agencyID;
    private String agencyRoleName;
    private String agencyStaffName;
    private String agencyStaff;
}

这是我的测试课

@WebMvcTest(controllers = AgencyController.class)
@AutoConfigureMockMvc(addFilters = false)
@ExtendWith(MockitoExtension.class)
public class AgencyIntegrationTest {
    
    @Autowired
    private MockMvc mockMvc;
    
    @MockBean
    private AgencyService service;
    @Autowired
    private ObjectMapper mapper;
    
    private AgencyDTORecord agency;
    
    @BeforeEach
    public void init()
    {
        agency = new AgencyDTORecord();
        agency.setAgencyAbout("For testing");
        agency.setAgencyAddress("test address");
        agency.setAgencyEmail("agency@test.com");
        agency.setAgencyLatitude("1000");
        agency.setAgencyLongitude("2000");
        agency.setAgencyName("The Test Agency");
        agency.setAgencyPhone("3000");
        agency.setAgencyPostCode("CT92LA");
        agency.setAgencyRoleName("Admin");
        agency.setAgencySecret("1234");
        agency.setAgencyStaff("Alao");
        agency.setAgencyID(Long.parseLong("0"));
        agency.setAgencyStaffName("Alao Akala");
    }
    
    @Test
public void testAgencySignup() throws Exception {
    given(service.saveAgency(any())).will(invocation -> invocation.getArgument(0));
    
    ResultActions response = mockMvc.perform(post("/app/api/agency/signup")
            .contentType(MediaType.APPLICATION_JSON)
            .content(mapper.writeValueAsString(agency))
    );
    
    response.andExpect(status().isCreated())
            .andExpect(jsonPath("$.agencyName", is(agency.getAgencyName())))
            .andExpect(jsonPath("$.agencyPhone", is(agency.getAgencyPhone())));
}