public void Can_get_add_remove_giftCardCouponCodes() { var customer = new Customer(); customer.ApplyGiftCardCouponCode("code1"); customer.ApplyGiftCardCouponCode("code2"); customer.RemoveGiftCardCouponCode("code2"); customer.ApplyGiftCardCouponCode("code3"); var codes = customer.ParseAppliedGiftCardCouponCodes(); codes.Length.ShouldEqual(2); codes[0].ShouldEqual("code1"); codes[1].ShouldEqual("code3"); }