// this simply tests a division by 12
// annual salary / 12
public void calculateGrossIncomeTest()
{
String stringPayslipPeriod = "Dec 2015";
uint annualSalary = 72000;
uint superRate = 2;
decimal expectedGrossIncome = 6000;
Calculator calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
decimal grossIncome = calc.getGrossIncome();
Console.WriteLine("annualSalary = {0} expected grossIncome = {1}, actual grossIncome = {2}",
annualSalary, expectedGrossIncome, grossIncome);
Assert.AreEqual(expectedGrossIncome, grossIncome);
// a salary which doens't divide exactly to 12 months
annualSalary = 61000;
// rounded down from 5083.(3) where (3) means .333333333333
expectedGrossIncome = 5083;
calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
grossIncome = calc.getGrossIncome();
Console.WriteLine("annualSalary = {0} expected grossIncome = {1}, actual grossIncome = {2}",
annualSalary, expectedGrossIncome, grossIncome);
Assert.AreEqual(expectedGrossIncome, grossIncome);
Console.WriteLine("test passed ok");
}
public void calculatePayslip()
{
String stringPayslipPeriod = "Dec 2015";
uint annualSalary = 18000;
uint superRate = 8;
decimal expectedGrossIncome = 1500;
decimal expectedIncomeTax = 0.00M;
uint expectedNetIncome = 1500;
uint expectedSuper = 120;
Calculator calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
uint grossIncome = calc.getGrossIncome();
decimal netIncome = calc.getNetIncome();
decimal incomeTax = calc.getIncomeTax();
decimal super = calc.getSuper();
// this will appear in the output of the testes,
// we could as well use log4net for that with the
// console setup
Console.WriteLine("grossIncome = {0}", grossIncome);
Console.WriteLine("netIncome = {0}", netIncome);
Console.WriteLine("incomeTax = {0}", incomeTax);
Console.WriteLine("super = {0}", super);
Assert.AreEqual(expectedGrossIncome, grossIncome);
Assert.AreEqual(expectedNetIncome, netIncome);
Assert.AreEqual(expectedIncomeTax, incomeTax);
Assert.AreEqual(expectedSuper, super);
Console.WriteLine("test passed ok");
}
// here we should test all the tax ranges and boundaries conditions
// for example the tax rate changes at 18000 dollarts, we should
// test for 17999, 18000, 18001 and 18002 dollars salary.
// However, even after $18000, the tax is still 0, till the salary
// is 18231. Then the tax will be 12 dollars per year, so in the payslip
// we can read 1 dollar/month
public void calculateIncomeTaxTest()
{
String stringPayslipPeriod = "Dec 2015";
uint annualSalary = 17999;
uint superRate = 8;
decimal expectedIncomeTax = 0;
Calculator calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
decimal incomeTax = calc.getIncomeTax();
Console.WriteLine("annualSalary = {0} expected incomeTax = {1}, actual incomeTax = {2}", annualSalary, expectedIncomeTax, incomeTax);
Assert.AreEqual(expectedIncomeTax, incomeTax);
// this is the limit for which tax is 0
stringPayslipPeriod = "Dec 2015";
annualSalary = 18000;
superRate = 8;
expectedIncomeTax = 0;
calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
incomeTax = calc.getIncomeTax();
Console.WriteLine("annualSalary = {0} expected incomeTax = {1}, actual incomeTax = {2}", annualSalary, expectedIncomeTax, incomeTax);
Assert.AreEqual(expectedIncomeTax, incomeTax);
// this is over the limit of 0 tax
// however up to 18231, the employee still doesn't pay
// anything, after 18231, the tax is one dollar
// so we can test the limit where the tax is 1 dollar.
stringPayslipPeriod = "Dec 2015";
annualSalary = 18231;
superRate = 8;
expectedIncomeTax = 0;
calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
incomeTax = calc.getIncomeTax();
Console.WriteLine("annualSalary = {0} expected incomeTax = {1}, actual incomeTax = {2}", annualSalary, expectedIncomeTax, incomeTax);
Assert.AreEqual(expectedIncomeTax, incomeTax);
stringPayslipPeriod = "Dec 2015";
annualSalary = 18232;
superRate = 8;
expectedIncomeTax = 1;
calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
incomeTax = calc.getIncomeTax();
Console.WriteLine("annualSalary = {0} expected incomeTax = {1}, actual incomeTax = {2}", annualSalary, expectedIncomeTax, incomeTax);
Assert.AreEqual(expectedIncomeTax, incomeTax);
Console.WriteLine("test passed ok");
}
// this should test the formula for calculating the super, which is:
// grossIncome * superRate / 100;
// however this is encapsultaed in the Calculator,
// so we let the calculator to do it then check the result
public void calculateSuperTest()
{
String stringPayslipPeriod = "Dec 2015";
uint annualSalary = 80000;
uint superRate = 2;
// this is 80000/12 - 1462 = 5205
decimal expectedSuper = 133;
Calculator calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
decimal super = calc.getSuper();
Console.WriteLine("annualSalary = {0} expected super = {1}, actual super = {2}",
annualSalary, expectedSuper, super);
Assert.AreEqual(expectedSuper, super);
// we should do more tests, like for 0%, 100%, over 100%
Console.WriteLine("test passed ok");
}
// net income is the gross income minus income tax
public void calculateNetIncomeTest()
{
String stringPayslipPeriod = "Dec 2015";
uint annualSalary = 80000;
uint superRate = 2;
// this is 80000/12 - 1462 = 5205
decimal expectedNetIncome = 5205;
Calculator calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
decimal netIncome = calc.getNetIncome();
Console.WriteLine("annualSalary = {0} expected net Income = {1}, actual net Income = {2}",
annualSalary, expectedNetIncome, netIncome);
Assert.AreEqual(expectedNetIncome, netIncome);
// we should check boundary condition as well,
// when the tax threshold changes, here just one
annualSalary = 180000;
// this is 15000 gross - 4546 tax
expectedNetIncome = 10454;
calc = new Calculator(stringPayslipPeriod, annualSalary, superRate);
netIncome = calc.getNetIncome();
Console.WriteLine("annualSalary = {0} expected net Income = {1}, actual net Income = {2}",
annualSalary, expectedNetIncome, netIncome);
Assert.AreEqual(expectedNetIncome, netIncome);
Console.WriteLine("test passed ok");
}
private Payslip calculateThePaySlip()
{
Payslip payslip = new Payslip();
//set the user details, say header of the payslip
payslip.stringFirstName = this.stringFirstName;
payslip.stringLastName = this.stringLastName;
payslip.stringPayslipPeriod = this.dateTimePickerPaysleepPeriod.Value.ToString("MMM yyyy");
// set the calculated values
// this is mm yyyy
// we should get the number of days after the start date of employment
// here we assume the employee has been working the full month
// and we don't check the employment start date
Calculator calculator = new Calculator(stringPayslipPeriod, uintAnnualSalary, uintSuperRate);
payslip.decimalGrossIncome = calculator.getGrossIncome();
payslip.decimalIncomeTax = calculator.getIncomeTax();
payslip.decimalNetIncome = calculator.getNetIncome();
payslip.decimalSuper = calculator.getSuper();
// ready for display
return payslip;
}
