public void CalculateTotalPriceTest_第一集1本_預計回傳100()
        {
            //Arrange
            var books = new Dictionary <string, int>()
            {
                { EPISODE1_ISBN, 1 }
            };
            var expected = 100;

            //Act
            var actual = PotterShoppingCart.CalculateTotalPrice(books);

            //Assert
            Assert.AreEqual(expected, actual);
        }
        public void CalculateTotalPriceTest_第一集1本_第二集1本_預計回傳190()
        {
            //Arrange
            var books = new Dictionary <string, int>()
            {
                { "哈利波特_1", 1 },
                { "哈利波特_2", 1 }
            };
            var expected = 190;

            //Act
            var actual = PotterShoppingCart.CalculateTotalPrice(books);

            //Assert
            Assert.AreEqual(expected, actual);
        }
        public void CalculateTotalPriceTest_第一集1本_第二集1本_第三集1本_第四集1本_第五集1本_預計回傳375()
        {
            //Arrange

            var books = new Dictionary <string, int>()
            {
                { EPISODE1_ISBN, 1 },
                { EPISODE2_ISBN, 1 },
                { EPISODE3_ISBN, 1 },
                { EPISODE4_ISBN, 1 },
                { EPISODE5_ISBN, 1 },
            };
            var expected = 375;

            //Act
            var actual = PotterShoppingCart.CalculateTotalPrice(books);

            //Assert
            Assert.AreEqual(expected, actual);
        }