No mapping for request with mockmvc

Currently struggling with problem when I get ‘mapping error for request’ with following controller/test configuration. Controller:

@Slf4j
@Validated
@RestController
@RequiredArgsConstructor
public class AdtechController {

private final AdtechService adtechService;

@PostMapping(value = "/subscriber/session")
public ResponseEntity<ResponseDto> submitSession(@RequestBody RequestDto requestDto) {
    log.trace("execute submitSession with {}", requestDto);
    ResponseDtoresponse = adtechService.submitSession(requestDto);
    return new ResponseEntity<>(response, HttpStatus.OK);
}

@ExceptionHandler(AdtechServiceException.class)
public ResponseEntity<AdtechErrorResponse> handleAdtechServiceException(AdtechServiceException e) {
    return new ResponseEntity<>(new AdtechErrorResponse(HttpStatus.INTERNAL_SERVER_ERROR.value(), e.getMessage()), HttpStatus.INTERNAL_SERVER_ERROR);
}

}

Test:

@RunWith(SpringRunner.class)
@SpringBootTest
@AutoConfigureMockMvc
@SpringJUnitConfig({AdtechTestConfig.class})
public class AdtechControllerTest {

private static final ObjectMapper OBJECT_MAPPER = JsonUtil.getJackson();

@Autowired
private MockMvc mockMvc;

@Test
public void testSubmitSession() throws Exception {
    RequestDto requestDto = new RequestDto ();
    requestDto.setKyivstarId("1123134");
    requestDto.setMsisdn("123476345242");
    requestDto.setPartnerId("112432523");
    requestDto.setPartnerName("125798756");
    String request = OBJECT_MAPPER.writeValueAsString(requestDto);
    System.out.println("REQUEST: " + request);
    String response = OBJECT_MAPPER.writeValueAsString(new ResponseDto("123"));
    System.out.println("RESPONSE: " + response);
    mockMvc.perform(post("/subscriber/session")
            .content(MediaType.APPLICATION_JSON_VALUE)
            .content(request))
            .andDo(print())
            .andExpect(status().isOk())
            .andExpect(content().string(containsString(response)));

}

}

Configuration:

@Configuration
public class AdtechTestConfig {

@Bean
public AdtechService adtechTestService() {
    return requestDto -> new AdtechResponseDto("123");
}

}

After test execution I get No mapping for POST /subscriber/session

The reason for the struggle is that my code from other modules with the same configuration works fine. Can somebody point out what am I missing ? Thanks in advance!

Answer

Apparently you are loading a configuration class to mock beans, this interferes with the other parts of Spring Boot and probably leads to partially loading your application. I suspect only the mocked service is available.

Instead of the test configuration use @MockBean to create a mock for the service and register behaviour on it.

@SpringBootTest
@AutoConfigureMockMvc
public class AdtechControllerTest {

  private static final ObjectMapper OBJECT_MAPPER = JsonUtil.getJackson();

  @Autowired
  private MockMvc mockMvc;
  @MockBean
  private AdtechService mockService;

  @BeforeEach
  public void setUp() {
    when(mockService.yourMethod(any()).thenReturn(new AdtechResponseDto("123")); 
  }


  @Test
  public void testSubmitSession() throws Exception {
    // Your original test method
  }
}

If the only thing you want to test is your controller you might also want to consider using @WebMvcTest instead of @SpringBootTest.

@WebMvcTest(AdTechController.class)
public class AdtechControllerTest {

  private static final ObjectMapper OBJECT_MAPPER = JsonUtil.getJackson();

  @Autowired
  private MockMvc mockMvc;
  @MockBean
  private AdtechService mockService;

  @BeforeEach
  public void setUp() {
    when(mockService.yourMethod(any()).thenReturn(new AdtechResponseDto("123")); 
  }


  @Test
  public void testSubmitSession() throws Exception {
    // Your original test method
  }
}

This will load a scaled-down version of the context (only the web parts) and will be quicker to run.