public void IgnoresUpcomingDiscountCode()
{
const decimal orderTotal = 100.0m;
var applier = new DiscountCodeApplier(UpcomingDiscountCode(10.0m));
Assert.AreEqual(100.0m, applier.DiscountedTotal(orderTotal));
}
public void IgnoresInactiveDiscountCode()
{
const decimal orderTotal = 100.0m;
var applier = new DiscountCodeApplier(DiscountCode(10.0m, false));
Assert.AreEqual(100.0m, applier.DiscountedTotal(orderTotal));
}
public void DiscountedTotalFromPercentageCannotBeLessThanZero()
{
const decimal orderTotal = 100.0m;
var applier = new DiscountCodeApplier(PercentageDiscountCode(110.0m));
Assert.AreEqual(0.0m, applier.DiscountedTotal(orderTotal));
}
public void CalculatesDiscountTotalFromPercentage()
{
const decimal orderTotal = 150.0m;
var applier = new DiscountCodeApplier(PercentageDiscountCode(20.0m));
Assert.AreEqual(120.0m, applier.DiscountedTotal(orderTotal));
}
public void CalculatesDiscountTotal()
{
const decimal orderTotal = 100.0m;
var applier = new DiscountCodeApplier(DiscountCode(10.0m));
Assert.AreEqual(90.0m, applier.DiscountedTotal(orderTotal));
}
public void AppliesAdjustment()
{
const decimal orderTotal = 100.0m;
var applier = new DiscountCodeApplier(DiscountCode(10.0m));
var adjustment = applier.DiscountAdjustment(orderTotal);
Assert.IsNotNull(adjustment);
Assert.AreEqual(-10.0m, adjustment.Amount);
}