Set keys1 = map1.keySet();
Set keys2 = map2.keySet();
Collection values1 = map1.values();
Collection values2 = map2.values();
assertEquals(true, keys1.containsAll(values2));
assertEquals(true, values2.containsAll(keys1));
assertEquals(true, values1.containsAll(keys2));
assertEquals(true, keys2.containsAll(values1));
}
// testGetKey