assertMapEquals(copy, "two", 2, "three", 3, "one", 1);
    assertSame(copy, ImmutableSortedMap.copyOf(copy, comparator));
    assertSame(comparator, copy.comparator());
  }

  public void testCopyOfImmutableSortedSetDifferentComparator() {
    Comparator<String> comparator = Ordering.<String>natural().reverse();
    Map<String, Integer> original = ImmutableSortedMap.of("one", 1, "two", 2, "three", 3);