rangeSet.add(range1);
        rangeSet.add(range2);
        testEnclosing(rangeSet);
        testEnclosing(rangeSet.complement());
      }
    }
  }

  public void testCreateCopy() {
    for (Range<Integer> range1 : QUERY_RANGES) {
      for (Range<Integer> range2 : QUERY_RANGES) {
        TreeRangeSet<Integer> rangeSet = TreeRangeSet.create();
        rangeSet.add(range1);