rangeSet.add(range1);
        rangeSet.add(range2);

        assertEquals(rangeSet, TreeRangeSet.create(rangeSet));
      }
    }
  }

  private RangeSet<Integer> expectedSubRangeSet(
      RangeSet<Integer> rangeSet, Range<Integer> subRange) {
    RangeSet<Integer> expected = TreeRangeSet.create();
    for (Range<Integer> range : rangeSet.asRanges()) {
      if (range.isConnected(subRange)) {