public void testIsList()
        {
            JDFIntegerRangeList goodRangeList = null;
            JDFIntegerRangeList badRangeList  = null;

            try
            {
                goodRangeList = new JDFIntegerRangeList("0 4");
                goodRangeList.Append(6, 6);
                goodRangeList.Append(7, 7);

                Assert.IsTrue(goodRangeList.isList(), "Bad isList " + goodRangeList.ToString());

                badRangeList = new JDFIntegerRangeList(goodRangeList);
                badRangeList.Append(new JDFIntegerRange("8~9"));

                Assert.IsFalse(badRangeList.isList(), "Bad isList" + badRangeList.ToString());
            }
            catch (FormatException)
            {
                Assert.Fail("FormatException");
            }
        }