public void test_ThanhToan()
        {
            int    idBill   = int.Parse(TestContext.DataRow[0].ToString());
            int    discount = int.Parse(TestContext.DataRow[1].ToString());
            double final    = int.Parse(TestContext.DataRow[2].ToString());
            bool   expected = bool.Parse(TestContext.DataRow[3].ToString());

            ;
            QuanLy q      = new QuanLy();
            bool   actual = q.ThanhCong(idBill, discount, final);

            Assert.AreEqual(expected, actual);
        }