Mocked restTemplate.postForObject is not being used in execution of test

Question

I have mocked a postForObject resttemplate call using mickito.

Mockito.when(restTemplate.postForObject(Mockito.eq(remoteServerlocation), Mockito.any(Input.class), Mockito.eq(String.class))).thenReturn(responseString);

But in the actual code, this mocked value is not being used and trying to call the remote location.

String responseString = restTemplate.postForObject(url, input, String.class);

As per my understanding , I have mocked exactly same call. But not working. Any help on this will be thankful.

I'm autowiring the class which contains the testing method in testcase class. And this test class I have created restTemplate using new.

TestClass

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = Application.class)
public class ActionImplTest {

    @Autowired
    private ActionImpl recommendation;

    RestTemplate restTemplate = new RestTemplate();

    @Test
    public void performActionTest() throws Exception {
        String textInput = "InputText";
        Map<String, Object> map = new HashMap<String, Object>();

        map.put("convId", "C123");
        map.put("reID", 1);
        map.put("chID", "Chann_1");

        String convID = "1254356671563";
        String chId = "2";
        String responseString = "Success"
        Mockito.when(restTemplate.postForObject(Mockito.eq("remoteServerlocation"), Mockito.any(Input.class), Mockito.eq(String.class))).thenReturn(responseString);

        Map<String, Object> response = recommendation.performAction(textInput, map, convID, chId);  
    }
}

Answer 1

Add a verify step at the end of your test, mockito will give you some hints on what was expected and what actually has been called:

Mockito.verify(restTemplate).postForObject(
    Mockito.eq(remoteServerlocation), Mockito.any(Input.class), Mockito.eq(String.class));

Answer 2

Here is an example of what I meant in the comment referring to the Spring documentation .

@RunWith(SpringRunner.class)
@SpringBootTest
public class ActionImplTest {

    @MockBean
    private RestTemplate restTemplate;

    @Autowired
    private ActionImpl recommendation;