Test jednostkowy aprobaty Retrofit 2 api z Mockito

Question

Potrzebuję porady, jak wyśmiewać api odpoczynku. Moja aplikacja jest w architekturze MVP.

Mój interfejs API:

public interface MyAPI { 

    @GET("{cmd}/{userName}/{password}") 
    Observable<Response> login(
     @Path("cmd") String cmd, 
     @Path("userName") String userName, 
     @Path("password") String password 
    ); 

Moje usługi:

public class MyService implements IService { 

    private static MyService mInstance = new MyService(); 
    private MyAPI mApi; 

    public static MyService getInstance() { 
     return mInstance; 
    } 

    private MyService() { 

     OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder(); 
     httpClientBuilder.connectTimeout(Config.DEFAULT_TIMEOUT, TimeUnit.SECONDS); 

     Retrofit retrofit = new Retrofit.Builder() 
      .baseUrl(Config.kBaseUrl) 
      .addConverterFactory(GsonConverterFactory.create()) 
      .addCallAdapterFactory(RxJavaCallAdapterFactory.create()) 
      .client(httpClientBuilder.build()) 
      .build(); 

     this.mApi = retrofit.create(MyAPI.class); 
    } 

    public void login(
     Subscriber<Response> subscriber, 
     String userName, 
     String password) { 
     mApi.login(Config.kLoginCmd,userName,password) 
      .subscribeOn(Schedulers.io()) 
      .unsubscribeOn(Schedulers.io()) 
      .observeOn(AndroidSchedulers.mainThread()) 
      .subscribe(subscriber); 
    } 

Moja klasa prezenter:

public class LoginPresenter implements LoginContract.Presenter { 

    LoginContract.View mView; 
    IService mService; 
    ISession mSession; 

    public LoginPresenter(LoginContract.View loginView, IService service, ISession session) { 
     mView = loginView; 
     mService = service; 
     mSession = session; 
    } 

    @Override 
    public void login(String email, String password) { 

     Subscriber<Response> subscriber = new Subscriber<Response>() { 
      @Override 
      public void onCompleted() { 
       mView.showLoading(false); 
      } 

      @Override 
      public void onError(Throwable e) { 
       mView.showError(e.getLocalizedMessage()); 
      } 

      @Override 
      public void onNext(Response response) { 
       if (response.getResults().getStatus().equalsIgnoreCase(Config.kResultCodeOK)) { 
        mView.loginSuccess(); 
       } else { 
        mView.showError(response.getResults().getStatus().getErrmsg()); 
       } 
      } 
     }; 

     mView.showLoading(true); 
     mService.login(
      subscriber, 
      email, 
      password); 
    } 

Nie ma innego sposobu, aby przetestować prezenter pisząc Mock usługi . Ale nie podoba mi się to tak bardzo i myślę, że Mockito mógłby pomóc.

Oto moja klasa Test:

public class LoginPresenterMockTest { 

    private LoginPresenter mLoginPresenter; 

    @Mock 
    LoginContract.View view; 
    @Mock 
    IService service; 
    @Mock 
    ISession session; 

    @Before 
    public void setup() throws Exception { 
     MockitoAnnotations.initMocks(this); 
     mLoginPresenter = new LoginPresenter(view, service, session); 
    } 

    @Test 
    public void testLoginWithCorrectUserNameAndPassword() throws Exception { 
     mLoginPresenter.login("user@email.com","password"); 
     verify(view).loginSuccess(); 
    } 

} 

Co chcę zrobić, to ja mock Loginsuccess połączenia danych odpowiedzi(), gdy odpowiedź jest poprawna.

Oczywiście mój obecny test nie zadziała. Potrzebuję porady, jak to udawać? Dowolny pomysł? Dzięki.

Answer 1

Można to zrobić w następnym sposób:

@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); 
} 

Answer 2

Dzięki za @Ilya Tretjakowa, wyszedłem z tego rozwiązania:

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(); 
}