public void GivenDonationAmountAnd20PercentTaxRate_ReturnGiftAidAmount(decimal donationAmount, decimal expectedGiftAidAmount)
{
SetUpSystemUnderTest(20.0m);
var result = _giftAidEvaluator.Calculate(donationAmount);
Assert.AreEqual(expectedGiftAidAmount, result);
}
public void GivenDonationOfZero_ReturnZeroGiftAidAmount()
{
_giftAidEvaluator = new GiftAidEvaluator(_taxRateValueSource.Object);
var result = _giftAidEvaluator.Calculate(0);
Assert.AreEqual(0, result);
}