@Test
public void testEqualsDifferentItems() {

    final OMultiKey multiKey = new OMultiKey(Arrays.asList(new String[]{"b", "c"}));
    final OMultiKey anotherMultiKey = new OMultiKey(Arrays.asList(new String[]{"a", "b"}));
    assertFalse(multiKey.equals(anotherMultiKey));
}