public void DiscounterFactory_GetsDiscounterForButter()
        {
            var factory = new DiscounterFactory();
            var product = new Product {
                Name = "butter"
            };

            var discounter = factory.GetDiscounter(product);

            Assert.Equal("butter", discounter.Product);
            Assert.Equal(2, discounter.QuantityNeeded);
            Assert.Equal("bread", discounter.DiscountOn);
            Assert.Equal(50, discounter.Discount);
            Assert.Equal(DiscountType.Percentage, discounter.DiscountType);
        }
        public void DiscounterFactory_GetsDiscounterForMilk()
        {
            var factory = new DiscounterFactory();
            var product = new Product {
                Name = "milk"
            };

            var discounter = factory.GetDiscounter(product);

            Assert.Equal("milk", discounter.Product);
            Assert.Equal(4, discounter.QuantityNeeded);
            Assert.Equal("milk", discounter.DiscountOn);
            Assert.Equal(100, discounter.Discount);
            Assert.Equal(DiscountType.Percentage, discounter.DiscountType);
        }