public void DiscountWasSuccessfullyApplied()
{
// scan all items in temp db.
foreach (var product in _productsDictionary)
{
_checkout.Scan(product.Value);
}
// Call discount service, with the _checkout in the constructor.
var discount = new Discount(_checkout);
// store original price in variable
var originalPrice = _checkout.GetTotalPrice();
// Run promotions through discount service
var prices = discount.GetDiscountedPrice(_promotionsDictionary);
// Apply discount with tuples
_checkout.ApplyDiscounts(prices);
var discountedPrice = _checkout.GetTotalPrice();
Assert.Multiple(() =>
{
Assert.That(discount, Is.Not.Null);
Assert.That(discount.GetProducts(), Is.Not.Null);
// Confirm that discounted price is in fact discounted
Assert.That(discountedPrice, Is.LessThan(originalPrice));
});
}