mock nested method calls using mockito

Question

I have got 4 classes lets says A, B, C, D each calling on methods from another one.

now I have mocked class A, and want to mock a method using mockito

A          


        

Answer 1

Try by creating mock of each of the nested object and then mock the individual method called by each of these object.

If the target code is like:

public Class MyTargetClass {

    public String getMyState(MyClass abc){

       return abc.getCountry().getState();
    }
}

Then to test this line we can create mocks of each of the individual nested objects like below:

public Class MyTestCase{

@Mock
private MyTargetClass myTargetClassMock;

@Mock
private MyClass myclassMockObj;

@Mock
private Country countryMockObj;

@Before
public void setUp() throws Exception {
    MockitoAnnotations.initMocks(this);
}

    @Test
    public void test01(){

       when(myclassMockObj.getCountry()).thenReturn(countryMockObj);
       when(countryMockObj.getState()).thenReturn("MY_TEST_STATE");
       Assert.assertEquals("MY_TEST_STATE", myTargetClassMock.getMyState(myclassMockObj));
    }
}