public void editExistingDiscount()
{
Boolean check = discountsArchive.editDiscount(1, 50, DateTime.Now.AddMonths(10).ToString());
Assert.IsTrue(check);
Discount d = discountsArchive.getDiscount(1);
Assert.AreEqual(d.Percentage, 50);
Assert.AreEqual(d.DueDate, DateTime.Now.AddMonths(10).ToString());
}