@Test
public void testDataLoaded() throws Exception {

    NasaRepository repository = Mockito.mock(NasaRepository.class);
    Observable<DayPicture> observable = Observable.just(new DayPicture());
    Mockito.when(repository.dayPicture()).thenReturn(observable);
    RepositoryProvider.setNasaRepository(repository);
    mViewModel.init();
    Mockito.verify(mViewModel).notifyPropertyChanged(BR.title);
    Mockito.verify(mViewModel).notifyPropertyChanged(BR.explanation);
    Mockito.verify(mViewModel).notifyPropertyChanged(BR.url);
}