public async Task MilkDiscounter_AppliesDiscount()
{
var discounter = new DiscounterService
{
Product = "milk",
QuantityNeeded = 4,
DiscountOn = "milk",
Discount = 100,
DiscountType = DiscountType.Percentage
};
var milk = new Product
{
Name = "milk",
Price = new Price {
Amount = 1.15m
},
Quantity = 8
};
var butter = new Product
{
Name = "butter",
Price = new Price {
Amount = 0.80m
},
Quantity = 2
};
var products = new List <Product> {
milk, butter
};
var receipt = new Receipt
{
Products = products,
Total = products.Sum(p => p.Quantity * p.Price.Amount)
};
await discounter.ApplyDiscountAsync(receipt);
Assert.Equal(8.50m, receipt.Total);
}
public async Task ButterDiscounter_AppliesDiscount()
{
var discounter = new DiscounterService
{
Product = "butter",
QuantityNeeded = 2,
DiscountOn = "bread",
Discount = 50,
DiscountType = DiscountType.Percentage
};
var butter = new Product
{
Name = "butter",
Price = new Price {
Amount = 0.80m
},
Quantity = 2
};
var bread = new Product
{
Name = "bread",
Price = new Price {
Amount = 1.00m
},
Quantity = 2
};
var products = new List <Product>
{
butter,
bread
};
var receipt = new Receipt
{
Products = products,
Total = products.Sum(p => p.Quantity * p.Price.Amount)
};
await discounter.ApplyDiscountAsync(receipt);
Assert.Equal(3.10m, receipt.Total);
}