public void ApplyDiscount_WhenThereIsNoMilkInBasket_TotalRemainsUnchanged()
{
// Arrange
var initTotal = 100;
var product = fixture.Create <Product>();
var basket = new Basket();
basket.AddItem(product, 10);
var subject = new FourMilkOffer();
// Act
var result = subject.ApplyDiscount(basket, initTotal);
// Assert
Assert.AreEqual(initTotal, result);
}
public void ApplyDiscount_WhenThereIsXAmountOfMilkInBasket_TotalIsCalculatedCorrectly(int qtyMilk, double priceMilk, double initTotal, double expected)
{
// Arrange
var milk = fixture.Build <Product>()
.With(p => p.Name, "Milk")
.With(p => p.Price, priceMilk)
.Create();
var basket = new Basket();
basket.AddItem(milk, qtyMilk);
var subject = new FourMilkOffer();
// Act
var result = Math.Round(subject.ApplyDiscount(basket, initTotal), 2);
// Assert
Assert.AreEqual(expected, result);
}
