    @Test
    public void testGetGroup() throws Exception {

        ExpandableGroup expandableGroup = new ExpandableGroup(parent);
        Section section = new Section();
        int sectionSize = 5;
        for (int i = 0; i < sectionSize; i++) {
            section.add(new DummyItem());
        }
        expandableGroup.add(section);
        Item lastItem = new DummyItem();
        expandableGroup.add(lastItem);
        expandableGroup.onToggleExpanded();

        assertEquals(lastItem, expandableGroup.getGroup(2));
    }