public void ShouldSetPropertiesFromConstructorArguments()
{
var loan = new HousingLoan(new LoanParameters {Amount = 500, Years=10 });
Assert.AreEqual(500, loan.LoanAmount);
Assert.AreEqual(120, loan.NumberOfMonths);
Assert.AreEqual(500, loan.Remaining);
}
public PaymentPlan CalculateLoan(LoanParameters loanParameters)
{
var loan = new HousingLoan(loanParameters);
var paymentScheme = new SeriesPaymentScheme();
var months = new List<PaymentMonth>();
for (int monthNumber = 1; monthNumber <= loan.NumberOfMonths; monthNumber++)
{
decimal monthlyPrincipal = paymentScheme.NextMonthlyPrincipal(loan);
var monthlyInterest = paymentScheme.NextMonthlyInterest(loan);
var monthlyTotal = monthlyPrincipal + monthlyInterest;
loan.Remaining -= monthlyPrincipal; //TODO: This doesn't smell right, should be immutable or just a local variable?
months.Add(new PaymentMonth(monthNumber, monthlyPrincipal, monthlyInterest, monthlyTotal, loan.Remaining));
}
var result = new PaymentPlan(months);
return result;
}
public void ShouldHaveExpectedInterestRate()
{
var loan = new HousingLoan(new LoanParameters());
Assert.AreEqual(1.035m, loan.InterestRate);
}
