public void TestSign()
{
var sec = new Security(applicationKey, applicationSecret);
var result = sec.SignRequest("POST", @"{""message"":""Hello world""}", "/v1/sms/+46700000000",
"2014-06-04T13:41:58Z");
Assert.AreEqual("5F5C418A0F914BBC8234A9BF5EDDAD97:olZ+EGML5mit6eOO7LzHdUuPkSeavDnPPXJ1T1A3nqI=", result);
}