public void CalculateDiscount_OrderEmpty_ThrowArgumentNullException()
{
BlackFridayDiscountCalculator discountCalculator = new BlackFridayDiscountCalculator(0m);
Action act = () => discountCalculator.CalculateDiscount(null);
act
.Should()
.Throw <ArgumentNullException>();
}
public void CalculateDiscount_DateIsNotBlackFriday_ReturnsNotDiscountTotalAmount()
{
Order order = OrderCase();
order.OrderedDate = BlackFriday.AddDays(-1);
BlackFridayDiscountCalculator discountCalculator = new BlackFridayDiscountCalculator(0.5m);
decimal result = discountCalculator.CalculateDiscount(order);
Assert.That(result, Is.EqualTo(0m));
}
public void CalculateDiscount_DateIsBlackFriday_ReturnsDiscountTotalAmount
(
decimal percentage,
decimal expected)
{
Order order = OrderCase();
order.OrderedDate = BlackFriday;
BlackFridayDiscountCalculator discountCalculator = new BlackFridayDiscountCalculator(percentage);
decimal result = discountCalculator.CalculateDiscount(order);
Assert.That(result, Is.EqualTo(expected));
}
