RestAssured with Mockito: mock dao repository

Question

I am trying to test my REST endpoints using RestAssured with mocking some of the service/repositories in the controller.

this is my test class:

@RunWith(SpringJUnit4ClassRunner.class)
@Transactional
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = {VedicaConfig.class})
@AutoConfigureMockMvc
@ActiveProfiles("test")
public class RESTTest {
@LocalServerPort
    private int port;

    @Autowired
    private MockMvc mvc;

    @Mock
    MetaVersionDAO metaVersionDAO;

    @InjectMocks
    DocCtrl docCtrl;

    @Before
    public void contextLoads() {
        RestAssured.port = port;
        assertThat(mvc).isNotNull();

        // this must be called for the @Mock annotations above to be processed.
        MockitoAnnotations.initMocks(this);
        RestAssuredMockMvc.standaloneSetup(MockMvcBuilders.standaloneSetup(docCtrl));
    }

    @Test
    public void shouldGetThumbnail() {
        String ver = "1.0";
        String uuid = "124-wqer-365-asdf";
        when(metaVersionDAO.getMetaByVersionUUID(ver, uuid)).thenReturn(new DocVersion());

        given()
                .when()
                .param("uuid", uuid)
                .param("versionVed", ver)
                .get(CTX_BASE + "/thumbnail")
                .then()
                .log().ifValidationFails()
                .statusCode(OK.value())
                .contentType(ContentType.BINARY);
    }

}

now, the REST endpoint itself is being hit correctly with supplied parameters. this endpoint has DocCtrl injected which uses metaVersionDAO instance in turn:

    public RawDocument getDocThumbnail(String uuid, String versionVed) throws Exception {
        DocVersion docVersion = metaVersionDAO.getMetaByVersionUUID(versionVed, uuid);
        InputStream inputStream = okmWebSrv.getOkmService().getContentByVersion(uuid, versionVed);
        String dataType = docVersion.getMetadata().getAdditionals().get(Vedantas.CONTENT_TYPE);
        ByteArrayInputStream bais = new ByteArrayInputStream(createPDFThumbnail(dataType, inputStream));

        RawDocument rawDocument = new RawDocument(bais, "qwer");
        return rawDocument;
    }

as you can see, I have tried to mock metaVersionDAO at the top of the @Test method so I expected it to return new DocVersion() as I set it to, but in this DAO the actual code is being called and it fails on entityManager which is null.

My question is why metaVersionDAO.getMetaByVersionUUID doesn't return my mocked object and what should I do to make it so?

spring-mock-mvc: 3.3.0 spring-boot: 2.1.2.RELEASE

Thanks!

Answer 1

solved by changing @Mock for @MockBean.

so it is:

    @MockBean
    MetaVersionDAO metaVersionDAO;

everything else remains the same as in the post and it uses mocked instance.