public void TaxShouldBeTenPercentOfSalary()
{
IncomeTaxationRule rule = new IncomeTaxationRule(0, 10);
decimal grossSalary = 100m;
var result = rule.CalculateTax(grossSalary);
decimal expectedTax = 10m;
Assert.AreEqual(expectedTax, result);
}
public void TaxShouldBeZero()
{
IncomeTaxationRule rule = new IncomeTaxationRule(decimal.MaxValue, 10);
decimal grossSalary = 10;
var result = rule.CalculateTax(grossSalary);
decimal expectedTax = 0m;
Assert.AreEqual(expectedTax, result);
}
public void ForNegativeSalaryShouldThrowArgumentException()
{
var grossSalary = -100;
IncomeTaxationRule rule = new IncomeTaxationRule(0, 100);
Assert.Catch <ArgumentException>(() =>
{
rule.CalculateTax(grossSalary);
});
}