public void CalculateTest(
decimal amount,
double duration,
string expectedMonthlyPayment,
string expectedTotalPaymentInInterestRate,
string expectedTotalPayment,
string expectedAdministrationFee)
{
var loan = new Loan(amount, duration);
var result = _loanService.Calculate(loan);
Assert.NotNull(result);
Assert.Equal(result.MonthlyPayment, expectedMonthlyPayment);
Assert.Equal(result.TotalPaymentInInterestRate, expectedTotalPaymentInInterestRate);
Assert.Equal(result.TotalLoanPayment, expectedTotalPayment);
Assert.Equal(result.AdministrationFee, expectedAdministrationFee);
}