public void MonthlyApr_ReverseCalculation_ReturnsOriginalValue(decimal principal, double interestRate, int amortisationInYears)
{
var test = new AmortisedScheduleGenerator(principal, interestRate, NumberOfPayments, amortisationInYears, startDate, BankHolidays());
Math.Round(Math.Pow(1 + test.MonthlyApr(), 12) - 1, 2)
.Should().Be(interestRate);
}
public void Schedule_GeneratesExpectedTotalInterest(decimal principal, double interestRate, int amortisationInYears, decimal expected)
{
var test = new AmortisedScheduleGenerator(principal, interestRate, NumberOfPayments, amortisationInYears, startDate, BankHolidays());
Math.Round(test.MonthlyScheduleItems.Sum(x => x.InterestAmount), 2)
.Should().Be(expected);
}
public void MonthlyApr_ReturnsExpectedValue(decimal principal, double interestRate, int amortisationInYears, double expected)
{
var test = new AmortisedScheduleGenerator(principal, interestRate, NumberOfPayments, amortisationInYears, startDate, BankHolidays());
Math.Round(test.MonthlyApr(), 4)
.Should().Be(expected);
}
public void Schedule_ReturnsExpectedBalloonAmount(decimal principal, double interestRate, int amortisationInYears, decimal expected)
{
var test = new AmortisedScheduleGenerator(principal, interestRate, NumberOfPayments, amortisationInYears, startDate, BankHolidays());
Math.Round(test.BalloonAmount(), 2)
.Should().Be(expected);
}
