public void DiscountIsZeroWhenNoButterAndOneBread()
{
LinkedDiscountCalculator breadAndButterDiscount = new LinkedDiscountCalculator(butter, bread, 2, 1, 0.5f);
Dictionary <Product, int> oneBreadNoButter = new Dictionary <Product, int>
{
{ bread, 1 },
};
decimal discount = breadAndButterDiscount.CalculateDiscount(oneBreadNoButter);
decimal expectedDiscount = 0;
Assert.AreEqual(expectedDiscount, discount);
}
public void DiscountIsOneBreadWhenTwoButterAndThreeBreadFor231()
{
LinkedDiscountCalculator breadAndButterDiscount = new LinkedDiscountCalculator(butter, bread, 2, 3, 1);
Dictionary <Product, int> fourBreadTwoButter = new Dictionary <Product, int>
{
{ bread, 3 },
{ butter, 2 }
};
decimal discount = breadAndButterDiscount.CalculateDiscount(fourBreadTwoButter);
decimal expectedDiscount = bread.Cost;
Assert.AreEqual(expectedDiscount, discount);
}
public void DiscountIsHalfBreadWhenTwoButterAndFourBread()
{
LinkedDiscountCalculator breadAndButterDiscount = new LinkedDiscountCalculator(butter, bread, 2, 1, 0.5f);
Dictionary <Product, int> fourBreadTwoButter = new Dictionary <Product, int>
{
{ bread, 4 },
{ butter, 2 }
};
decimal discount = breadAndButterDiscount.CalculateDiscount(fourBreadTwoButter);
decimal expectedDiscount = bread.Cost * 0.5m;
Assert.AreEqual(expectedDiscount, discount);
}
public void CanNotCreateLinkedCalculatorWithNoDiscountProducts()
{
LinkedDiscountCalculator breadAndButterDiscount = new LinkedDiscountCalculator(butter, bread, 2, 0, 0.5f);
}