public void expect_exception_when_argument_equals_null()
{
ICalculation <MarketRateInputModel, MarketRateOutputModel> rateCalculation =
new RateCalculation();
rateCalculation.Calculate(null);
}
public void expect_true_for_correct_requested_amount()
{
ICalculation <MarketRateInputModel, MarketRateOutputModel> rateCalculation =
new RateCalculation();
var loanAmount = 1000;
var rate = 0.07;
var term = 36;
var result = rateCalculation.Calculate(new MarketRateInputModel(loanAmount, term, rate));
Assert.AreEqual(loanAmount, result.RequstedAmount);
}
public void expect_true_for_correct_total_repayment()
{
ICalculation <MarketRateInputModel, MarketRateOutputModel> rateCalculation =
new RateCalculation();
var loanAmount = 1000;
var rate = 0.07;
var term = 36;
var result = rateCalculation.Calculate(new MarketRateInputModel(loanAmount, term, rate));
// excepted result is true
var expectedTotalPayment = (decimal)1111.57;
var currentTotalPayment = Math.Truncate(result.TotalPayment * 100) / 100;
Assert.AreEqual(expectedTotalPayment, currentTotalPayment);
}
/// <summary>
/// Get offer for good match with requested amount
/// </summary>
/// <param name="requestedAmount"></param>
/// <param name="lenderMarkerDatas"></param>
private List <MarketRateOutputModel> FindPossibleQuotes(decimal requestedAmount, List <MarketData> lenderMarkerDatas)
{
var rateCalculation = new RateCalculation();
var possibleQuotes = new List <MarketRateOutputModel>();
// requestedAmount assign to neededAmount
var neededAmount = requestedAmount;
foreach (var lenderData in lenderMarkerDatas)
{
// if lender has amount which I needed, get all money. Otherwise, get money which is available
var available = neededAmount >= lenderData.Available
? lenderData.Available
: neededAmount;
var rateInput = new MarketRateInputModel
{
Amount = available,
Rate = lenderData.Rate,
Term = Term
};
// calculate rate and repayment
var rateOutput = rateCalculation.Calculate(rateInput);
possibleQuotes.Add(rateOutput);
// subtraction avaible money from needed amount
neededAmount -= available;
// exit loop when we get money which I needed
if (neededAmount <= 0)
{
break;
}
}
return(possibleQuotes);
}
public void expect_exception_when_interest_rate_equal_zero()
{
ICalculation <MarketRateInputModel, MarketRateOutputModel> rateCalculation =
new RateCalculation();
var loanAmount = 1000;
var rate = 0;
var term = 36;
Exception exception = null;
try
{
rateCalculation.Calculate(new MarketRateInputModel(loanAmount, term, rate));
}
catch (Exception ex)
{
exception = ex;
}
var isTrue = CheckException(exception, ErrorMessage.ArgumentRateGreaterThanZero);
Assert.IsTrue(isTrue);
}