public void CreateInvoice()
        {
            var id = DB.Insert(accountID, shippID, quantity, sCost, pCost, tax, total,
                               Convert.ToString(orderDate), Convert.ToString(payDate), Convert.ToString(arrivalDate),
                               Convert.ToString(postDate), status, mail);
            var result = DB.GetInvoiceBy(id);

            Assert.AreEqual(ExpectedInt, id);
            Assert.AreEqual(Expected, result.GetEmail());
        }