public uint IncomeTax(uint annualIncome)
{
TaxBand band = TaxBands.GetTaxBand(annualIncome);
double value = band.VariableTax * (annualIncome - band.TaxableIncomeLB - 1) + band.FlatTax;
return((uint)Math.Round((double)value / 12, 0, MidpointRounding.AwayFromZero));
}
public void GetTax_WhenBothAmountAndLowerBoundAreZero_ReturnZero()
{
var taxBand = TaxBand.Create(20, "band1");
var tax = taxBand.GetTax(0, 0);
tax.Should().Be(0);
}
public void GetTax_WhenUpperBoundIsNull_ReturnsProductOfRateAndDifferenceOfAmountAndLowerBound()
{
var taxBand = TaxBand.Create(20, "band1");
var tax = taxBand.GetTax(2000m, 10000m);
tax.Should().Be((10000m - 2000) * (20 / 100m));
}
public void GetTax_WhenLowerBoundLargerThanAmount_ReturnZero(decimal lowerBound, decimal amount)
{
var taxBand = TaxBand.Create(20, "band1", 10000);
var tax = taxBand.GetTax(lowerBound, amount);
tax.Should().Be(0);
}
public void GetTax_WhenAmountLargerThanUpperBound_ReturnsProductOfRateAndDifferenceOfUpperBoundAndLowerBound()
{
var taxBand = TaxBand.Create(20, "band1", 10000);
var tax = taxBand.GetTax(2000, 12000);
tax.Should().Be((10000m - 2000) * (20 / 100m));
}
public void GetTax_WhenAmountLessThanOrEqualToUpperBound_ReturnsProductOfRateAndDifferenceOfAmountAndLowerBound(decimal amount)
{
var taxBand = TaxBand.Create(20, "band1", 10000);
var tax = taxBand.GetTax(2000, amount);
tax.Should().Be((amount - 2000) * (20 / 100m));
}
public double TaxFor(double grossSalary)
{
var lowerTaxBand = new TaxBand(5000.0, 0.1, null);
var middleTaxBand = new TaxBand(20000.0, 0.2, lowerTaxBand);
var upperTaxBand = new TaxBand(40000.0, 0.4, middleTaxBand);
return(upperTaxBand.TaxFor(grossSalary));
}
public void CompareTo_Test(decimal?upperBound1, decimal?upperBound2, int expectedResult)
{
var taxBand1 = TaxBand.Create(20, "band1", upperBound1);
var taxBand2 = TaxBand.Create(20, "band2", upperBound2);
var result = taxBand1.CompareTo(taxBand2);
result.Should().Be(expectedResult);
}
private void Init(bool isPostBack)
{
InitMessage();
_IEditTaxBandView.Title = "ÐÞ¸ÄË°½×";
if (!isPostBack)
{
TaxBand taxBand = _ITax.GetTaxBandByTaxBandID(_IEditTaxBandView.TaxBandID);
_IEditTaxBandView.BandMin = taxBand.BandMin.ToString();
_IEditTaxBandView.TaxRate = (taxBand.TaxRate * 100).ToString();
}
}
public double TaxFor(double grossSalary)
{
var upperTaxBand = new TaxBand(40000.0, 0.4);
var upperTaxBracketTax = upperTaxBand.TaxInBand(grossSalary);
var remainingGrossForMiddleAndLowerBrackets = upperTaxBand.GrossToTaxInBandsBelowCurrent(grossSalary);
var middleTaxBand = new TaxBand(20000.0, 0.2);
var middleTaxBracketTax = middleTaxBand.TaxInBand(remainingGrossForMiddleAndLowerBrackets);
var remainingGrossForLowerBracket = middleTaxBand.GrossToTaxInBandsBelowCurrent(remainingGrossForMiddleAndLowerBrackets);
var lowerTaxBand = new TaxBand(5000.0, 0.1);
var lowerTaxBracketTax = lowerTaxBand.TaxInBand(remainingGrossForLowerBracket);
return(lowerTaxBracketTax + middleTaxBracketTax + upperTaxBracketTax);
}
public List <TaxBand> GetAllTaxBand()
{
List <TaxBand> taxBandList = new List <TaxBand>();
SqlCommand cmd = new SqlCommand();
using (SqlDataReader sdr = SqlHelper.ExecuteReader("GetAllTaxBand", cmd))
{
while (sdr.Read())
{
TaxBand taxBand =
new TaxBand(Convert.ToInt32(sdr[_DbPKID]), Convert.ToDecimal(sdr[_DbBandMin]),
Convert.ToDecimal(sdr[_DbTaxRate]));
taxBandList.Add(taxBand);
}
}
return(taxBandList);
}
public TaxBand GetTaxBandByTaxBandID(int taxBandID)
{
TaxBand taxBand = null;
SqlCommand cmd = new SqlCommand();
cmd.Parameters.Add(_PKID, SqlDbType.Int).Value = taxBandID;
using (SqlDataReader sdr = SqlHelper.ExecuteReader("GetTaxBandByTaxBandID", cmd))
{
while (sdr.Read())
{
taxBand =
new TaxBand(Convert.ToInt32(sdr[_DbPKID]), Convert.ToDecimal(sdr[_DbBandMin]),
Convert.ToDecimal(sdr[_DbTaxRate]));
}
}
return(taxBand);
}
public void IntegrationTest_WithMockProvider()
{
(var taxBandProviderMock, _, _) = GetMocks();
var band1 = TaxBand.Create(0, "band1", 12_500m);
var band2 = TaxBand.Create(20, "band2", 50_000m);
var band3 = TaxBand.Create(40, "band3", 150_000m);
var band4 = TaxBand.Create(45, "band4");
var taxBands = new List <TaxBand>()
{
band1, band2, band3, band4
};
taxBandProviderMock.Setup(x => x.GetAll()).Returns(taxBands);
var service = new CalculateTaxService(taxBandProviderMock.Object, new TaxBandHelper());
(var tax, _) = service.GetTax(52_000m);
tax.Should().Be(8_300m);
}
public TaxBand(double minimumGross, double taxRate, TaxBand lowerTaxBand)
{
this.minimumGross = minimumGross;
this.taxRate = taxRate;
this.lowerTaxBand = lowerTaxBand;
}
private double CalculateTaxInBand(TaxBand taxBand)
{
return(MonetaryAmountInBand(taxBand.LowerBand, taxBand.RangeOfBand) * taxBand.Percentage);
}
public void GetTax_WhenLowerBoundLessThanZero_ThrowError()
{
var taxBand = TaxBand.Create(20, "band1");
taxBand.Invoking(x => x.GetTax(-1m, 1m)).Should().Throw <InvalidOperationException>();
}
