public void Monthly_Compounding_Interest()
{
const double amount = 1000;
const double rate = 0.070;
const int payments = 36;
var calculator = new LoanCalculator(amount, rate, payments);
Assert.That(calculator.Total, Is.EqualTo(1111.5754871533859d));
Assert.That(calculator.Monthly, Is.EqualTo(30.877096865371833d));
}
public Offer FindMinimumRateFor(double requestedAmount)
{
var offers = _repository.FindAll(o => o.Available >= requestedAmount);
if (!offers.Any())
return new Offer {IsEmpty = true};
var minimumOffer = offers.OrderBy(o => o.Rate).First();
minimumOffer.RequestedAmount = requestedAmount;
var calculator = new LoanCalculator(requestedAmount, minimumOffer.Rate, 36);
minimumOffer.Monthly = calculator.Monthly;
minimumOffer.Total = calculator.Total;
return minimumOffer;
}