    @Test
    public void removeToEmptyShowLeadingAndTrailing() {

        configure(5, SHOW_LEADING_AND_TRAILING);
        mFakeAdapter.clear();
        assertThat(mDividerAdapter.getItemCount()).isEqualTo(2);
        verify(mObserver).onItemRangeRemoved(0, 5);
        verify(mObserver).onItemRangeInserted(0, 1);
        verify(mObserver).onItemRangeInserted(1, 1);
        verifyNoMoreInteractions(mObserver);
    }