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

  public void testCopyOfSortedExplicit() {
    Comparator<String> comparator = Ordering.<String>natural().reverse();
    SortedMap<String, Integer> original = Maps.newTreeMap(comparator);
    original.put("one", 1);
    original.put("two", 2);