    @Test
    public void should_be_one_dog_after_save() {

        InMemoryDogRepository repository = InMemoryDogRepository.getInstance();
        AddAnimalPresenter presenter = new AddAnimalPresenter(repository);
        presenter.attachView(mockView);
        presenter.addNewDog(new DogFirebase());
        assertThat(repository.getCachedDogs().size(), is(1));
    }