public void UpdateDiscountTest()
{
Discount discount = new Discount();
discount.Percent = 20;
discount.Validity = DateTime.Now;
discount.ClientId = 1000;
DiscountDAO discountDAO = new DiscountDAO();
discountDAO.AddDiscount(discount);
List <Discount> list = discountDAO.GetDiscount((int)discount.ClientId);
discount = list[list.Count - 1];
discount.Percent = 5;
discountDAO.UpdateDiscount(discount);
list = discountDAO.GetDiscount((int)discount.ClientId);
string expected = ToStringWithoutId(discount);
string actual = ToStringWithoutId(list[list.Count - 1]);
Assert.AreEqual(expected, actual);
}