public void ShouldCalculateOnlyRegularJanuar2020Salary()
{
var employeeId = new EmployeeId("emp-01");
var salary = new Salary(100, Currency.Dollar);
var employee = new HourlyEmployee(employeeId, salary, buildYearWorks(2020, 8));
var januar2020Salary = employee.CalculateSalary(new Period(2020, 1));
Assert.AreEqual(18400, januar2020Salary.Salary.Value);
Assert.AreEqual(Currency.Dollar, januar2020Salary.Salary.Currency);
Assert.AreEqual(new DateTime(2020, 1, 1), januar2020Salary.Begin);
Assert.AreEqual(new DateTime(2020, 1, 31), januar2020Salary.End);
}