public void TestProcessMonthlyInterest()
        {
            TestSnapShotDailyBalance();
            InterestController interestController = new InterestController();
            double interestRate = interestController.GetInterestRate(_unitUnderTest);
            _unitUnderTest.ProcessMonthlyInterest(interestRate);
            Assert.AreEqual(105 + ((150.0 + 105.0) / 2 * interestRate) /*108.1875*/, _unitUnderTest.GetBalance());

            Account oldAccount = new Account(150, new DateTime(DateTime.Now.AddYears(-7).Ticks));
            oldAccount.SnapShotDailyBalance();
            oldAccount.Withdraw(45);
            oldAccount.SnapShotDailyBalance();
            interestRate = interestController.GetInterestRate(oldAccount);
            oldAccount.ProcessMonthlyInterest(interestRate);
            Assert.AreEqual(105 + ((150.0 + 105.0) / 2 * interestRate), oldAccount.GetBalance());

            Account newAccountWHighBalance = new Account(70000);
            newAccountWHighBalance.SnapShotDailyBalance();
            newAccountWHighBalance.Deposit(60000);
            newAccountWHighBalance.SnapShotDailyBalance();
            interestRate = interestController.GetInterestRate(newAccountWHighBalance);
            newAccountWHighBalance.ProcessMonthlyInterest(interestRate);
            Assert.AreEqual(130000 + ((70000.0 + 130000.0) / 2 * interestRate) /*132500*/, newAccountWHighBalance.GetBalance());

            Account oldAccountWHighBalance =
                new Account(70000, new DateTime(DateTime.Now.AddYears(-7).Ticks));
            oldAccountWHighBalance.SnapShotDailyBalance();
            oldAccountWHighBalance.Deposit(60000);
            oldAccountWHighBalance.SnapShotDailyBalance();
            interestRate = interestController.GetInterestRate(oldAccountWHighBalance);
            oldAccountWHighBalance.ProcessMonthlyInterest(interestRate);
            Assert.AreEqual(130000 + ((70000.0 + 130000.0) / 2 * interestRate), oldAccountWHighBalance.GetBalance());
        }