public void ToISO8601StringTest()
{
Assert.IsTrue(string.IsNullOrEmpty(IETFValueEncoding.ToISO8601String(null)));
Assert.IsFalse(string.IsNullOrEmpty(IETFValueEncoding.ToISO8601String(DateTime.Now)));
DateTime dt = new DateTime(2020, 4, 4, 12, 30, 23);
// This was accurate as of the time and location tested (the date above in the US Eastern Time Zone)
string exp = "20200404T123023-04:00";
Assert.AreEqual(exp, IETFValueEncoding.ToISO8601String(dt));
}
