public void CalculatorFee_is_1_episode_1_quantity_Fee_Should_Be_100()
        {
            //arrange
            var target = new CalculatorFeeService();

            var expected = 100;

            //act
            var actual = target.CalculatorFee();

            //assert
            Assert.AreEqual(expected, Convert.ToInt32(actual));

        }        
        public void CalculatorFee_is_1_episode_1_quantity_2_episode_1_quantity_3_episode_1_quantity_4_episode_1_quantity_Fee_Should_Be_320()
        {
            //arrange
            var stubDAO = new StubShoppingCartDao();
            var target = new CalculatorFeeService(stubDAO, 4);

            var expected = 320;

            //act
            var actual = target.CalculatorFee();

            //assert
            Assert.AreEqual(expected, Convert.ToInt32(actual));

        }