public void SimpleAddCouponOnCategory()
        {
            List <int> lst = new List <int>();

            lst.Add(cola);
            List <string> lst2 = new List <string>();

            lst2.Add("drinks");


            Assert.IsTrue(ss.addNewCoupons(zahi, store.getStoreId(), "coupon", 2, lst, lst2, 10, "20/6/2018", "") > -1);
            Coupon c = ca.getCoupon("coupon", cola);

            Assert.AreEqual(c.DueDate, "20/6/2018");
            Assert.AreEqual(c.CouponId, "coupon");
            Assert.AreEqual(c.Percentage, 10);
        }