@Test
public void create_backButton() {

    @SuppressWarnings("Convert2Lambda") Task<Drawable> onSuccess = spy(new Task<Drawable>() {
        @Override
        public void run(Drawable param) {
        }
    });
    uut.resolve(backButton(), onSuccess);
    verifyZeroInteractions(imageLoader);
    verify(onSuccess).run(any());
}