public void RoundValueTest()
{
decimal value = 8.56m;
DecimalExtensionMethods.RoundValue(value);
Assert.AreEqual(Math.Round(value, 1), 8.6m);
Assert.AreEqual(Math.Round(value, 0), 9m);
}
public decimal CalculateMonthlyPayableIncomeTax(decimal annualTaxableIncome)
{
Validator.IsValidValue(annualTaxableIncome);
var taxBracket = GetTaxBracket(annualTaxableIncome);
var marginalTax = CalculateMarginalTax(annualTaxableIncome, taxBracket);
var monthlyIncomeTax = (taxBracket.AccumulatedTaxFromPreviousBracket + marginalTax) / Constants.MonthsInYear;
return(DecimalExtensionMethods.RoundValue(monthlyIncomeTax));
}
public PayslipInfo Calculate(PayslipInput payslipInput)
{
TaxCalculator taxCalculator = new TaxCalculator();
var salary = payslipInput.Salary;
var grossIncome = DecimalExtensionMethods.RoundValue(CalculateMonthlyTaxableIncomeFrom(salary));
var incomeTax = taxCalculator.CalculateMonthlyPayableIncomeTax(salary);
return(new PayslipInfo(payslipInput.Employee,
payslipInput.PayPeriod,
payslipInput.SuperRate,
grossIncome,
incomeTax,
grossIncome - incomeTax,
DecimalExtensionMethods.RoundValue(grossIncome * payslipInput.SuperRate)));
}
public void CalculateMonthlyPayableIncomeTaxTest()
{
decimal expected = 922m;
decimal annualTaxableIncome = 60050;
TaxCalculator taxCalculator = new TaxCalculator();
var taxBracket = taxCalculator.GetTaxBracket(annualTaxableIncome);
var marginalTax = taxCalculator.CalculateMarginalTax(annualTaxableIncome, taxBracket);
var monthlyIncomeTax = (taxBracket.AccumulatedTaxFromPreviousBracket + marginalTax) / Constants.MonthsInYear;
decimal actual = DecimalExtensionMethods.RoundValue(monthlyIncomeTax);
Assert.AreEqual(expected, actual);
}