static void Main(string[] args)
{
if (args == null)
{
return;
}
var serviceProvider = new ServiceCollection()
.AddTransient <IDiscountProvider, DiscountProvider>()
.AddTransient <IDiscountManager, DiscountManager>()
.AddTransient <IPurchaseManager, PurchaseManager>()
.BuildServiceProvider();
var purchase = new CustomerPurchase();
var prices = new Dictionary <ItemType, double>()
{
{ ItemType.Apple, 0.5 },
{ ItemType.Banana, 0.7 },
{ ItemType.Orange, 0.45 },
};
foreach (var item in args)
{
if (Enum.TryParse(item, out ItemType type) &&
prices.TryGetValue(type, out double price))
{
purchase.AddItem(new PurchasedItem(type, price));
}
}
var total = serviceProvider.GetService <IPurchaseManager>().GetPurchaseTotal(purchase);
Console.WriteLine($"The total of purchases is: {total} pounds");
Console.ReadKey();
}
public void AddItem_NullItem_ShouldThrow()
{
Assert.ThrowsException <ArgumentNullException>(() => _purchase.AddItem(null));
}
public void GetPurchaseTotal_NoDiscount()
{
_purchase.AddItem(new PurchasedItem(ItemType.Apple, 0.5));
_purchase.AddItem(new PurchasedItem(ItemType.Apple, 0.5));
_purchase.AddItem(new PurchasedItem(ItemType.Apple, 0.5));
var total = _purchaseManager.GetPurchaseTotal(_purchase);
Assert.AreEqual(1.5, total);
}