CODEWITHSUNDEEP
java
Raikyn
Raikyn

Reputation: 163

How to mock ObjectMapper with mokito?

I'm having trouble with mocking an ObjectMapper bean with mokito.

My class containing the ObjectMapper :

public class ServiceParent{

        @Autowired
    protected ObjectMapper objectMapper;

        public void someMethod(){
        ...
        Map<String, String> mapResponse = objectMapper.readValue("some json", new TypeReference<Map<String, String>>(){});

}

Other class extending previous one

public class ServiceChild extends ServiceParent{
...

}

My test class :

@SpringBootTest
public class TestService{
       @Mock
       ObjectMapper objectMapper;

    @InjectMocks
    ServiceChild  serviceChild;

 @Test
 public void test(){
    Map<String, String> mapResponse=new HashMap<String, String>();
        mapResponse.put("access_token", "token_bouhon");
        Mockito.when(objectMapper.readValue(Mockito.anyString(), Mockito.any(Class.class))).thenReturn(mapResponse);

}

So when I debug this, in ServiceParent, objectMapper isn't null but readValue(...) return null.

Do you have an idea on how to return the correct mocked object?

Thanks

Upvotes: 2

Views: 8959

Answers (2)

Azhagu Surya
Azhagu Surya

Reputation: 131

I faced the same NPE with the objectmapper. This issue is resolved after adding , my test class has class level annotation with

@RunWith(MockitoJUnitRunner.class)

and the fix

 @Before
    public void setupBefore() {
        MockitoAnnotations.initMocks(this);

    }

Upvotes: 1

rdas
rdas

Reputation: 21285

@Mock creates a new mock. It's equivalent to calling mock(SomeClass.class)

@MockBean creates a mock, like @Mock, but also replaces any bean already in the application context with the same type with that mock. So any code which Autowires that bean will get the mock.

You need to use @MockBean

Upvotes: 0

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