assertThat(set)
        .containsExactly(new LegacyComparable("bar"), new LegacyComparable("foo"))
        .inOrder();
  }

  public void testNewTreeSetEmptyWithComparator() {
    TreeSet<Integer> set = Sets.newTreeSet(SOME_COMPARATOR);
    verifySortedSetContents(set, EMPTY_COLLECTION, SOME_COMPARATOR);
  }

  public void testNewIdentityHashSet() {