Unit Test of Retrofit 2 api call with Mockito

Question

I need some advices on how to mock a rest api. My application is in MVP architecture.

My interface for API:

public interface MyAPI {

    @GET(\"{cmd         


        

Answer 1

Thanks for @Ilya Tretyakov, I came out this solution:

private ArgumentCaptor<Subscriber<Response>> subscriberArgumentCaptor;

@Test
public void testLoginWithCorrectUserNameAndPassword() throws Exception {
    mLoginPresenter.login("user@email.com","password");
    // create the mock Response object
    Response response = ......

    verify(service, times(1)).login(
        subscriberArgumentCaptor.capture(),
        stringUserNameCaptor.capture(),
        stringPasswordCaptor.capture()
    );

    subscriberArgumentCaptor.getValue().onNext(response);
    verify(view).loginSuccess();
}

Answer 2

You can do it in next way:

@Test
public void testLoginWithCorrectUserNameAndPassword() throws Exception {
    // create or mock response object
    when(service.login(anyString(), anyString(), anyString).thenReturn(Observable.just(response));
    mLoginPresenter.login("user@email.com","password");
    verify(view).loginSuccess();
}

@Test
public void testLoginWithIncorrectUserNameAndPassword() throws Exception {
    // create or mock response object
    when(service.login(anyString(), anyString(), anyString).thenReturn(Observable.<Response>error(new IOException()));
    mLoginPresenter.login("user@email.com","password");
    verify(view).showError(anyString);
}