public void cannot_validate_loan_request_for_value_less_than_minimum()
{
var lenders = TestHelpers.GetSevenLendersForTesting();
var requestLoanFromMarket = new RequestLoanFromMarket(100, 36, _currency);
var validRequest = _loanRequestValidator.ValidateLoanRequest(requestLoanFromMarket,
lenders);
validRequest.ErrorMessages.Count.Should().Be(1);
validRequest.IsValid.Should().BeFalse();
validRequest.ErrorMessages.Should().Contain(x => x == "This is less than the minimum allowed. Our lending options start at £1,000.00.");
}
public void cannot_validate_loan_request_for_incremement_that_is_not_100()
{
var lenders = TestHelpers.GetSevenLendersForTesting();
var requestLoanFromMarket = new RequestLoanFromMarket(1790, 36, _currency);
var validRequest = _loanRequestValidator.ValidateLoanRequest(requestLoanFromMarket,
lenders);
validRequest.ErrorMessages.Count.Should().Be(1);
validRequest.IsValid.Should().BeFalse();
validRequest.ErrorMessages.Should().Contain(x => x == "This is not an increment of £100.00. Please specify an amount of any £100.00 increment between £1,000.00 and £15,000.00.");
}
public void cannot_validate_loan_request_for_value_over_maximum()
{
var lenders = TestHelpers.GetSevenLendersForTesting();
var requestLoanFromMarket = new RequestLoanFromMarket(17000, 36, _currency);
var validRequest = _loanRequestValidator.ValidateLoanRequest(requestLoanFromMarket,
lenders);
validRequest.ErrorMessages.Count.Should().Be(2);
validRequest.IsValid.Should().BeFalse();
validRequest.ErrorMessages.Should().Contain(x => x == "This is more than the maximum allowed. We can only lend up to £15,000.00.");
validRequest.ErrorMessages.Should().Contain(x => x == "There are not enough funds available to service your request, the maximum we can lend is £2,330.00");
}
/// <inheritdoc />
public ValidLoanRequest ValidateLoanRequest(RequestLoanFromMarket requestLoanFromMarket,
IEnumerable<Lender> availableLenders)
{
//find out how much we can possibly lend
var maximumAvailable = availableLenders.Sum(x => x.Available);
//set the currency format for messages..
_numberFormat = requestLoanFromMarket.Currency.Value;
//a container for error messages
var errorMessages = new List<string>();
//if the requested loan amount if greater than the maxiumum amount a borrower
//can request then set an error message
if (requestLoanFromMarket.Amount > _maximumLoanRequest)
{
errorMessages.Add(
string.Format(
"This is more than the maximum allowed. We can only lend up to {0}.",
FormatNumberForCurrency(_maximumLoanRequest)));
}
//if the requested loan amount if less than the minimum loan request then
//set an error message
if (requestLoanFromMarket.Amount < _minimumLoanRequest)
{
errorMessages.Add(
string.Format("This is less than the minimum allowed. Our lending options start at {0}.",
FormatNumberForCurrency(_minimumLoanRequest)));
}
//if the loan amount is not a valid increment value
//set an error message
if (requestLoanFromMarket.Amount % _allowedIncrement > 0)
{
errorMessages.Add(
string.Format(
"This is not an increment of {0}. Please specify an amount of any {0} increment between {1} and {2}.",
FormatNumberForCurrency(_allowedIncrement),
FormatNumberForCurrency(_minimumLoanRequest),
FormatNumberForCurrency(_maximumLoanRequest)));
}
//if the loan amount if greater than the maximum available
//set an error message
if (requestLoanFromMarket.Amount > maximumAvailable)
{
errorMessages.Add(string.Format("There are not enough funds available to service your request, the maximum we can lend is {0}", FormatNumberForCurrency(maximumAvailable)));
}
//if we have any error messages return an invalid loan request else return a valid loan request
return errorMessages.Count > 0 ? new ValidLoanRequest(errorMessages, false) : new ValidLoanRequest(new List<string>(), true);
}
public void can_request_loan_from_market()
{
//set up
var lenders = TestHelpers.GetSevenLendersForTesting();
var addLendersToMarket = new AddLendersToMarket(lenders);
_marketService.AddLendersToMarket(addLendersToMarket);
var amountRequested = 1000;
var repaymentMonths = 36;
//act
var requestLoanFromMarket = new RequestLoanFromMarket(amountRequested, repaymentMonths, new Currency(new CultureInfo("en-gb").NumberFormat));
var quote = _marketService.RequestQuoteFromMarket(requestLoanFromMarket);
//assert
quote.Quote.RequestedAmount.Should().Be(amountRequested);
quote.Quote.TotalRepyment.Should().Be(new decimal(1233.08));
quote.Quote.MonthlyRepayment.Should().Be(new decimal(34.25));
quote.Quote.Rate.Should().Be(0.1);
}
/// <inheritdoc />
public ResponseToLoanRequest RequestQuoteFromMarket(RequestLoanFromMarket requestLoanFromMarket)
{
//get all the lenders with available money
var lenders = _lenderRepository.FindBy(x => x.Available > 0);
//convert he ienumberable to an array or we can get enumeration problems! This is
//not ideal.
var availableLenders = lenders as Lender[] ?? lenders.ToArray();
//validate the loan request
var validateRequest = _loanRequestValidator.ValidateLoanRequest(requestLoanFromMarket,
availableLenders);
//if the loan request isnt valid
if (!validateRequest.IsValid)
{
//return a response that indicates failure.
return new ResponseToLoanRequest(null, validateRequest);
}
//get the best offers for the loan request
var offers = _loanCalculator.GetTheBestAvailableOffersFromLenders(availableLenders, requestLoanFromMarket.Amount);
//work out the quote from the offers
var quote = _loanCalculator.CalculateQuoteFromOffers(offers, requestLoanFromMarket.RepaymentMonths,
requestLoanFromMarket.Amount);
//return the quote with a successful response
return new ResponseToLoanRequest(quote, new ValidLoanRequest(new List<string>(), true));
}
/// <summary>
/// This method takes the arguments passed into the console and attempts to get a quote.
/// </summary>
/// <param name="args"></param>
private static void GetQuote(string[] args)
{
var marketService = _unityContainer.Resolve<IMarketService>();
var consoleService = _unityContainer.Resolve<IDocumentService>();
var printService = _unityContainer.Resolve<IPrintService>();
//receive a request for a loan which has the current market and the loan amount required..
var documentLocation = args[0];
var loanAmountRequested = Convert.ToDecimal(args[1]);
var numberOfRepaymentMonths = Convert.ToInt32(ConfigurationManager.AppSettings["NumberOfRepaymentMonths"]);
//parse the document to get the lenders
var lenders = consoleService.GetLendersFromDocument(documentLocation);
//persist the current market
var addLendersToMarket = new AddLendersToMarket(lenders);
marketService.AddLendersToMarket(addLendersToMarket);
//try and get the loan requested
var requestLoanFromMarket = new RequestLoanFromMarket(loanAmountRequested, numberOfRepaymentMonths, new Domain.Model.Currency(new CultureInfo("en-gb").NumberFormat));
var responseToLoanRequest = marketService.RequestQuoteFromMarket(requestLoanFromMarket);
printService.PrintResponseToLoanRequest(responseToLoanRequest);
}
public void can_validate_loan()
{
var lenders = TestHelpers.GetSevenLendersForTesting();
var requestLoanFromMarket = new RequestLoanFromMarket(1000, 36, _currency);
var validRequest = _loanRequestValidator.ValidateLoanRequest(requestLoanFromMarket,
lenders);
validRequest.ErrorMessages.Count.Should().Be(0);
validRequest.IsValid.Should().BeTrue();
}
