public int CalculateIncomeTax(int annualSalary, CalculationFrequency calculationFrequency)
        {
            TaxBracketConfigSection settings = TaxBracketConfigSection.LoadSettings();
            var taxInfo = settings.TaxBrackets
                          .Find(taxBracket => (taxBracket.MinSalary == 0 || annualSalary > taxBracket.MinSalary) &&
                                (taxBracket.MaxSalary == -1 || annualSalary <= taxBracket.MaxSalary));

            int   taxableDollars = annualSalary - taxInfo.MinSalary;
            int   baseTax        = taxInfo.BaseTax;
            float centsPerDollar = taxInfo.TaxInCentsPerDollar;

            var tax = (baseTax + (taxableDollars * (centsPerDollar / 100))) / (int)calculationFrequency;

            return(((decimal)tax).RoundToNearestInt());
        }
 public void TestInitialize()
 {
     _taxCalculator = new TaxCalculatorService();
     _settings      = TaxBracketConfigSection.LoadSettings();
 }