assertEquals(map1.hashCode(), map2.hashCode());
assertEquals(map2.hashCode(), map3.hashCode());
// values()
Collection<Object> values1 = map1.values();
Collection<Object> values2 = map2.values();
Collection<Object> values3 = map3.values();
assertTrue(values1.containsAll(values2));
assertTrue(values2.containsAll(values1));
assertTrue(values2.containsAll(values3));
assertTrue(values3.containsAll(values2));