public void Buy_First_To_Fourth_Each_One_Book()
{
// arrange
var target = new HarryPotterDiscount();
var shoppingItems = new SaleBook[] {
new SaleBook {
ISBN = "9573317249", Name = "哈利波特(1)：神秘的魔法石", Price = 100, Count = 1
},
new SaleBook {
ISBN = "9573317583", Name = "哈利波特(2)：消失的密室", Price = 100, Count = 1
},
new SaleBook {
ISBN = "9573318008", Name = "哈利波特(3)：阿茲卡班的逃犯", Price = 100, Count = 1
},
new SaleBook {
ISBN = "9573318318", Name = "哈利波特(4)：火盃的考驗", Price = 100, Count = 1
}
};
var expected = 320m;
// act
var actual = target.CaculateDiscount(shoppingItems);
// assert
Assert.AreEqual(expected, actual);
}
public void Buy_One_Book()
{
// arrange
var target = new HarryPotterDiscount();
var shoppingItems = new SaleBook[] {
new SaleBook {
ISBN = "9573317249", Name = "哈利波特(1)：神秘的魔法石", Price = 100, Count = 1
}
};
var expected = 100m;
// act
var actual = target.CaculateDiscount(shoppingItems);
// assert
Assert.AreEqual(expected, actual);
}