Mockito doesn't work with custom validator in Spring

Question

I am using Mockito to test one of my get-mappings in the controller class. Here is my get method

 @PostMapping(value = "insert/carbooking")
    public ResponseEntity<Void> reservation(@Valid BookingRequest bookRequest) {
        return validate(bookRequest, carService::booking);
    }

At the top of my class is my Validator

  @Autowired
  private ReservationValidator reservationValidator;

  @InitBinder("bookRequest")
    protected void bookRequestBinder(WebDataBinder binder) {
        binder.addValidators(reservationValidator);
    }

Here is the Mockito test method. The result should have returned bad request since the sin is in wrong format.

@Test
    public void reservationTest2() throws Exception {

        mockMvc.perform(MockMvcRequestBuilders
                .post("insert/carbooking")
                .param("license", "data")
                .param("SIN", "202007191517")
                .accept(MediaType.MULTIPART_FORM_DATA))
                .andExpect(status().isBadRequest());
    }

But the test fail

java.lang.AssertionError: Status expected:<400> but was:<200>
Expected :400
Actual   :200

Is there any way for the Mockito to receive the "reservationValidator" ?

Answer 1

I got everything fixed thanks to @chrylis-onstrike- . For the source code, I just need to remove @Before addholders set up method and replace it with the annotation @Autowired on Mockmvc mockmvc and @MockBean on service class which put the client class on the application context. It's such a shame I could not give tick mark to his answer since he didn't post the answer to my question rather commenting on it.