}

  public void testEmptyImmutableEnumMap() {
    ImmutableMap<AnEnum, String> map = Maps.immutableEnumMap(ImmutableMap.<AnEnum, String>of());
    assertEquals(ImmutableMap.of(), map);
  }

  public void testImmutableEnumMapOrdering() {
    ImmutableMap<AnEnum, String> map =
        Maps.immutableEnumMap(ImmutableMap.of(AnEnum.C, "c", AnEnum.A, "a", AnEnum.E, "e"));

    assertThat(map.entrySet())