public void CalculatePrice_ThreeForTwo_CalculatesCorrectPrice()
{
decimal expected = 20.00M;
var sku = new Sku("3 for 2 Item");
var threeForTwoPricingRule = new XForYPricingRule(3, 2);
var threeForTwoItem = new Item(sku, 10.00M, threeForTwoPricingRule);
decimal actual = threeForTwoItem.CalculatePrice(3);
Assert.Equal(expected, actual);
}
public void CalculatePrice_TwoForOneOnFourItems_CalculatesCorrectPrice()
{
decimal expected = 20.00M;
var sku = new Sku("2 for 1 Item");
IPricingRule twoForOnePricingRule = new XForYPricingRule(2, 1);
var twoForOneItem = new Item(sku, 10.00M, twoForOnePricingRule);
decimal actual = twoForOneItem.CalculatePrice(4);
Assert.Equal(expected, actual);
}
public void Pricing_TwoForOne_CalculatesCorrectPrice()
{
decimal expected = 10.00M;
var sku = new Sku("2 for 1 Item");
var twoForOnePricingRule = new XForYPricingRule(2, 1);
var twoForOneItem = new Item(sku, 10.00M, twoForOnePricingRule);
var checkout = new Checkout(twoForOneItem);
checkout.Scan(sku);
checkout.Scan(sku);
decimal actual = checkout.CalculateTotal();
Assert.Equal(expected, actual);
}
public void Pricing_ThreeForTwo_CalculatesCorrectPrice()
{
decimal expected = 20.00M;
var sku = new Sku("3 for 2 Item");
var threeForTwoPricingRule = new XForYPricingRule(3, 2);
var threeForTwoItem = new Item(sku, 10.00M, threeForTwoPricingRule);
var checkout = new Checkout(threeForTwoItem);
checkout.Scan(sku);
checkout.Scan(sku);
checkout.Scan(sku);
decimal actual = checkout.CalculateTotal();
Assert.Equal(expected, actual);
}
public void Calculate_NegativeCount_Throws()
{
var pricingRule = new XForYPricingRule("productId", 1.0m, 3, 2);
pricingRule.Invoking(pr => pr.Calculate(-1)).Should().Throw <ArgumentException>();
}
public void CalculateTests(decimal price, int x, int y, int count, decimal total)
{
var pricingRule = new XForYPricingRule("productId", price, x, y);
pricingRule.Calculate(count).Should().Be(total);
}