public void ChargeLateFee_ShouldIncreaseBalance()
{
var basicLoan = LoanFactory.CreateLoan("basic", 100, 10M, 24);
basicLoan.ChargeLateFee();
basicLoan.Balance.Should().Be(225);
}
public void MakePayment_ShouldDecreaseBalanceByPaymentAmount()
{
var basicLoan = LoanFactory.CreateLoan("basic", 10000, 10M, 24);
basicLoan.MakePayment(2500);
basicLoan.Balance.Should().Be(7500);
}
public void CanCalculateInterest_ShouldIncreaseBalanceByRate()
{
var basicLoan = LoanFactory.CreateLoan("basic", 10000, 10M, 24);
var interestAccrued = basicLoan.ApplyInterest();
interestAccrued.Should().Be(1000);
basicLoan.Balance.Should().Be(11000);
}
public PaymentSchedule GetPaymentSchedule(LoanType loanType, int duration, double principal)
{
Validate(duration, principal);
var factory = new LoanFactory();
var loan = factory.GetLoan(loanType);
var calculationStrategy = new FixedMonthlyRateCalculationStrategy();
var loanCalulator = new LoanCalculator(calculationStrategy);
return(loanCalulator.GetPaymentSchedule(new LoanCalculationParameters()
{
AnnualInterestRate = loan.InterestRate,
PaybackTimeInYears = duration,
Principal = principal
}));
}
public LoanController(IPaymentCalculator paymentCalculator, LoanFactory loanFactory)
{
_paymentCalculator = paymentCalculator;
_loanFactory = loanFactory;
}
public Loan GetLoan(LoanType type, double interestRate)
{
return(LoanFactory.CreateLoanInstance(type, interestRate));
}
public void MakePaymentGreaterThanBalance_ShouldThrowException()
{
var basicLoan = LoanFactory.CreateLoan("basic", 100, 10M, 24);
Assert.Throws <LoanOverpaymentException>(() => basicLoan.MakePayment(30000));
}
public void CreateInvalidLoanType_ShouldThrowException()
{
Assert.Throws <ArgumentException>(() => LoanFactory.CreateLoan("aiofnqweiufwiubfweif", 10000, 8.65M, 24));
}
public void CanCreateBasicLoan()
{
var basicLoan = LoanFactory.CreateLoan("basic", 10000, 8.65M, 24);
basicLoan.GetType().Name.Should().Be("BasicLoan");
}
