@Test
public void testFindItemById() {

    CHILD_1.setId(12345);
    CHILD_2.setId(23456);
    mItemGroup.addChild(CHILD_1);
    mItemGroup.addChild(CHILD_2);
    assertSame("Find item 23456 should return child 2",
            CHILD_2, mItemGroup.findItemById(23456));
}