@Test
public void testCreateViewHolderNoBcakground() {

    RecyclerItemAdapter adapter = new RecyclerItemAdapter(mItemGroup);
    FrameLayout parent = new FrameLayout(InstrumentationRegistry.getContext());
    final ItemViewHolder viewHolder =
            adapter.onCreateViewHolder(parent, R.layout.test_list_item_no_background);
    assertNull("Background should be null", viewHolder.itemView.getBackground());
}