Testing DataSource with Mockito

PokeDataSourceTest.java

    @Inject PokeService pokemonService;   

    @Test
    public void testGetPokemonAbilityStringObservable() {
        PokeDataSource dataSource = new PokeDataSource(pokemonService);
        TestObserver observer = new TestObserver();
        dataSource.getPokemonAbilityStringObservable("12")
                .subscribe(observer);
        observer.assertNoErrors();
        observer.awaitTerminalEvent();
        observer.assertComplete();
        observer.assertValue("Id: 12\n" +
                "Name: butterfreeAbility Name : tinted-lens\n" +
                " Is Hidden : true");
    }