public void Checkout_WithDiscountCard_AmountOfSaleIsAddedToDiscountCard()
{
var sale = new Sale();
var discountCard = new DiscountCard(1000);
sale.Add(new Product("A", 2000));
sale.AddDiscountCard(discountCard);
Assert.Equal(1, discountCard.CurrentPercent());
Assert.Equal(1980, sale.Checkout());
Assert.Equal(3, discountCard.CurrentPercent());
}
public void Checkout_WithDiscountCard_DiscountAppliesToProductIfVolumeIsNotReached()
{
var sale1 = new Sale();
var discountCard = new DiscountCard(1000);
var product = new Product("A", 2000, new VolumeDiscount(3000, 2));
sale1.Add(product);
sale1.AddDiscountCard(discountCard);
Assert.Equal(1, discountCard.CurrentPercent());
Assert.Equal(1980, sale1.Checkout());
Assert.Equal(3, discountCard.CurrentPercent());
}
public void Checkout_WithDiscountCard_NoDiscountForVolume()
{
var sale1 = new Sale();
var product = new Product("A", 2000, new VolumeDiscount(3000, 2));
var discountCard = new DiscountCard(1000);
sale1.Add(product);
sale1.Add(product);
sale1.AddDiscountCard(discountCard);
Assert.Equal(1, discountCard.CurrentPercent());
Assert.Equal(3000, sale1.Checkout());
Assert.Equal(1, discountCard.CurrentPercent());
}
public void Checkout_WithoutDiscountCard_DiscountCardDoesntApplyToNewSale()
{
var sale1 = new Sale();
var discountCard = new DiscountCard(1000);
var product = new Product("A", 2000);
sale1.Add(product);
sale1.AddDiscountCard(discountCard);
sale1.Checkout();
var sale2 = new Sale();
sale2.Add(product);
Assert.Equal(3, discountCard.CurrentPercent());
Assert.Equal(2000, sale2.Checkout());
Assert.Equal(3, discountCard.CurrentPercent());
}