public void CharacterizeRefactoredVersion(
Product dummyProduct,
Mock <IDiscountRepository> dummyRepository,
Mock <IAuthorize> dummyAuthorizer)
{
dummyProduct.DiscountType = "percentage";
dummyRepository.Setup(x => x.GetDiscountForType(
It.IsAny <string>(),
It.IsAny <string>())).Returns(.5M);
dummyAuthorizer.Setup(x => x.IsAuthorized()).Returns(true);
// composition root
var percentoff = new PercentageDiscountStrategy();
var moneyoff = new MoneyOffDiscountStrategy();
var unknown = new UnknownDiscountStrategy();
var runfirst = new RunFirstCompositeStrategy(new IDiscountStrategy[]
{
percentoff,
moneyoff,
unknown
});
var discountCalculator = new RefactoredProductClass(
dummyRepository.Object,
runfirst);
var authorizedSut = new AuthorizableDiscountCalculator(
dummyAuthorizer.Object,
discountCalculator);
// end composition root
var actual = authorizedSut.GetDiscountPrice(dummyProduct);
Assert.Equal(dummyProduct.Price * .5M, actual);
}
public void MoneyOffDiscountStrategyShouldRunIsCorrect(
Product testProduct,
MoneyOffDiscountStrategy sut)
{
testProduct.DiscountType = "moneyoff";
Assert.True(sut.ShouldRunFor(testProduct));
}
public void MoneyOffDiscountStrategyShouldNotRunIsCorrect(
Product testProduct,
string bogusdiscounttype,
MoneyOffDiscountStrategy sut)
{
testProduct.DiscountType = bogusdiscounttype;
Assert.False(sut.ShouldRunFor(testProduct));
}
public void MoneyOffDiscountStrategyThrowsOnLowDiscount(
Product p,
decimal discount,
MoneyOffDiscountStrategy sut)
{
if (Math.Abs(discount) != 0)
{
discount = -discount;
}
Assert.Throws <InvalidDiscountException>(() => sut.DiscountProduct(p, discount));
}
public void MoneyOffDiscountStrategyThrowsOnHighDiscount(
Product p,
decimal discount,
MoneyOffDiscountStrategy sut)
{
while (discount < p.Price)
{
discount = discount + Math.Abs(discount);
}
Assert.Throws <InvalidDiscountException>(() => sut.DiscountProduct(p, discount));
}
public void MoneyOffDiscountStrategyCalculationIsCorrect(
Product p,
decimal discount,
MoneyOffDiscountStrategy sut)
{
if (discount > p.Price)
{
discount = discount - (discount - 1);
}
var actual = sut.DiscountProduct(p, discount);
Assert.Equal(p.Price - discount, actual);
}
