public void GivenAnEmployee_WhenCalculateAnnualSalary_ThenGetsAnnualSalary()
{
//given
Employee employee = new HourlySalaryEmployee
{
HourlySalary = 10
};
//when
var result = _salaryService.CalculateAnnualSalary(employee);
//Then
Assert.AreEqual(14400, result);
}