assertEquals(expectedValues.size(), mapValues.size());
    assertTrue(expectedValues.containsAll(mapValues));
    assertTrue(mapValues.containsAll(expectedValues));
  }

  public void testTransformEmptyMapEquality() {
    Map<String, String> map =
        transformValues(ImmutableMap.<String, Integer>of(), Functions.toStringFunction());
    assertMapsEqual(new HashMap<>(), map);
  }