public void testgetUDNByFormattedStr2()
        {
            //Assert.Throws(typeof(GEDCOMDateException), () => {
            var dtx = GEDCOMDate.GetUDNByFormattedStr("20-12-1980", GEDCOMCalendar.dcGregorian, true);

            Assert.AreEqual("1980/12/20", dtx.ToString());
            //});
        }
        public void testGetUDNByFormattedStr()
        {
            string dateStr   = "";
            UDN    expResult = UDN.CreateEmpty();
            UDN    result    = GEDCOMDate.GetUDNByFormattedStr(dateStr, GEDCOMCalendar.dcGregorian);

            Assert.AreEqual(expResult, result);
        }