public void CalculateTest_Book1_Buy_one_Book2_Buy_one_Book3_Buy_one_Price_270()
        {
            //arrange
            var target = new Books();
            var booksInfo = new ViewModelBooks
            {
                Price = 0,
                BookQty = new int[] { 1, 1, 1 }
            };

            //act
            target.CalculatePrice(booksInfo);

            //assert
            var expected = 270;
            Assert.AreEqual(expected, booksInfo.Price);
        }
        public void CalculateTest_Book1_Buy_two_Book2_Buy_five_Book3_Buy_three_Book4_Buy_Four_Book5_Buy_Two_Price_935()
        {
            //arrange
            var target = new Books();
            var booksInfo = new ViewModelBooks
            {
                Price = 0,
                BookQty = new int[] { 2, 5, 3, 4, 2 }
            };

            //act
            target.CalculatePrice(booksInfo);

            //assert
            var expected = 935;
            Assert.AreEqual(expected, booksInfo.Price);
        }