public void AddCurrentSale_AfterAddingLastSale_AppliesNewDiscountPercent()
{
var discountCard = new DiscountCard(1500);
var totalPriceWithOnePercentDiscount = discountCard.Apply(1000);
discountCard.AddCurrentSale(1000);
Assert.Equal(990, totalPriceWithOnePercentDiscount);
Assert.Equal(970, discountCard.Apply(1000));
}
public void Apply_WithRoundings()
{
var discountCard = new DiscountCard(7);
var priceWithDiscount = discountCard.Apply(91.5m);
priceWithDiscount.ShouldBe(85.10m);
}
public void Apply_WithoutRoundings()
{
var discountCard = new DiscountCard(10);
var priceWithDiscount = discountCard.Apply(100m);
priceWithDiscount.ShouldBe(90m);
}
public void GetTotalPrice_WithoutDiscountPercent_ReturnsUnitPrice()
{
var discountCard = new DiscountCard();
Assert.Equal(10, discountCard.Apply(10));
}
public void GetTotalPrice_WithDiscountPercent_ReturnsReducedPrice()
{
var discountCard = new DiscountCard(1500);
Assert.Equal(990, discountCard.Apply(1000));
}