Map<String, String> expected = ImmutableMap.of("a", "1");
    assertMapsEqual(expected, map);
    assertEquals(expected.get("a"), map.get("a"));
  }

  public void testTransformIdentityFunctionEquality() {
    Map<String, Integer> underlying = ImmutableMap.of("a", 1);
    Map<String, Integer> map = transformValues(underlying, Functions.<Integer>identity());
    assertMapsEqual(underlying, map);
  }