public void validateRangeIterators() {

        SortedRangeSet srs1 = new SortedRangeSet("1-10");

        Iterator i1 = srs1.rangeIterator();

        assert i1.hasNext() : "We should have one Range instance in our iterator.";

        assert ((Range) i1.next()).toRepresentation().equals("1-10");

        assert !i1.hasNext() : "There should be only one instance in our iterator.";

        SortedRangeSet srs2 = new SortedRangeSet("1-5,8,10-15");

        Iterator i2 = srs2.rangeIterator();

        assert i2.hasNext() && i2.next() instanceof Range

            && i2.hasNext() && i2.next() instanceof Range

            && i2.hasNext() && i2.next() instanceof Range

            && !i2.hasNext() : "There should be exactly three Range instances in our iterator.";

        SortedRangeSet srs3 = new SortedRangeSet("");

        assert !srs3.iterator().hasNext() : "Iterator should be empty.";

    }