ImmutableSortedSet.copyOf(
            STRING_LENGTH, asIterator("in", "the", "quick", "jumped", "over", "a"));
    assertThat(set.comparator()).isEqualTo(STRING_LENGTH);
  }

  public void testCopyOf_sortedSetIterable() {
    SortedSet<String> input = Sets.newTreeSet(STRING_LENGTH);
    Collections.addAll(input, "in", "the", "quick", "jumped", "over", "a");
    SortedSet<String> set = copyOf(input);