public void CartExpiration()
{
byte[] Xml;
AutoGen.CheckoutShoppingCart Cart;
CheckoutShoppingCartRequest Req = new CheckoutShoppingCartRequest
("123", "456", EnvironmentType.Sandbox, "USD", 0);
Req.AddItem("Mars bar", "", 0.75m, 2);
Req.AddFlatRateShippingMethod("USPS", 4.30m);
Req.SetExpirationMinutesFromNow(10);
Xml = Req.GetXml();
Cart = (AutoGen.CheckoutShoppingCart)EncodeHelper.Deserialize(Xml);
DateTime Exp = Cart.shoppingcart.cartexpiration.gooduntildate;
Exp = Exp.ToLocalTime();
TimeSpan T = Exp.Subtract(DateTime.Now);
Assert.IsTrue(T.TotalSeconds <= 600);
Assert.IsTrue(T.TotalSeconds > 595);
}
