public void throw_an_exception_if_there_are_no_offers()
{
var marketLenders = new LenderMarket(interestCalculation.Object);
Action action = () => marketLenders.GetMinInterestRate(Fakes.EmptyOffers, new Money(1000m), NumberOfMonthlyPayments);
action.ShouldThrow <InsufficientOffersAmountException>();
}
public void cut_the_last_included_lenders_offer_if_it_would_overflow_loan_amount()
{
var marketLenders = new LenderMarket(interestCalculation.Object);
var loanOffers = new LoanOffers(new List <LoanOffer> {
new LoanOffer("Jane", janeInterestRate.Annual, 1100)
});
marketLenders.GetMinInterestRate(loanOffers, aPrincipal, NumberOfMonthlyPayments);
interestCalculation.Verify(a => a.GetMonthlyPayment(aPrincipal, janeInterestRate, NumberOfMonthlyPayments), Times.Once);
}
public void throw_an_exception_if_offers_amount_not_sufficient()
{
var marketLenders = new LenderMarket(interestCalculation.Object);
interestCalculation
.Setup(a => a.GetMonthlyPayment(It.IsAny <Money>(), It.IsAny <InterestRate>(), It.IsAny <int>()))
.Returns(aMoney);
interestCalculation.Setup(a => a.FindCompoundInterestRate(It.IsAny <Money>(), It.IsAny <Money>(),
It.IsAny <int>(), It.IsAny <InterestRate>(), It.IsAny <InterestRate>()))
.Returns(anInterestRate);
Action action = () => marketLenders.GetMinInterestRate(Fakes.OneOfferOnly, new Money(1000m), NumberOfMonthlyPayments);
action.ShouldThrow <InsufficientOffersAmountException>();
}
public void use_the_most_competitive_lenders_offers_for_calculating_min_interest_rate()
{
var marketLenders = new LenderMarket(interestCalculation.Object);
var offers = new LoanOffers(new List <LoanOffer>
{
new LoanOffer("Bob", bobInterestRate.Annual, (int)bobOffer.Amount),
new LoanOffer("Jane", janeInterestRate.Annual, (int)janeOffer.Amount),
new LoanOffer("Fred", fredInterestRate.Annual, (int)fredOffer.Amount)
});
interestCalculation.Setup(a => a.GetMonthlyPayment(janeOffer, janeInterestRate, NumberOfMonthlyPayments)).Returns(janeMonthlyRepayment);
interestCalculation.Setup(a => a.GetMonthlyPayment(fredOffer, fredInterestRate, NumberOfMonthlyPayments)).Returns(fredMonthlyRepayment);
interestCalculation.Setup(a => a.FindCompoundInterestRate(It.IsAny <Money>(), It.IsAny <Money>(),
It.IsAny <int>(), It.IsAny <InterestRate>(), It.IsAny <InterestRate>()))
.Returns(anInterestRate);
var interestRate = marketLenders.GetMinInterestRate(offers, aPrincipal, NumberOfMonthlyPayments);
interestRate.ShouldBeEquivalentTo(anInterestRate);
interestCalculation.Verify(a => a.FindCompoundInterestRate(aPrincipal, janePlusFredRepayment,
NumberOfMonthlyPayments, janeInterestRate, fredInterestRate), Times.Once);
}