public void Calculate()
        {
            var     calculator   = new MonthlyPaymentCalculator();
            int     loanAmount   = 1000;
            decimal interestRate = 0.0552M;
            int     months       = 36;

            var monthlyPayment = calculator.Calculate(loanAmount, interestRate, months);

            Assert.AreEqual(30.20M, monthlyPayment);
        }
        public void GetMonthlyPaymentTest()
        {
            MonthlyPaymentCalculator calculator = new MonthlyPaymentCalculator()
            {
                LoanAmount      = 100000,
                InterestRate    = 3.92,
                LoanTermInYears = 30
            };

            double result = calculator.GetMonthlyPayment();

            Assert.AreEqual(472.81, result);
        }