public class CalcularDiasColombia.vr02

public class CalcularDiasColombia {
    public class BusinessDays{
        public BusinessHours bHours;

        public BusinessDays(String businessHoursName){

        bHours = [SELECT Id FROM BusinessHours WHERE Name =: businessHoursName];
        }
        public BusinessDays(){

        bHours = [SELECT Id FROM BusinessHours WHERE IsDefault = true];
        }
        public Datetime addDays(Datetime startDate, Integer days){
            BusinessDays bd = new BusinessDays('BusinessHours');
            bd.addDays (Date.today (), 3);

            startDate = BusinessHours.nextStartDate(bHours.Id, startDate);

            for (Integer elapsed = 0; elapsed < days; elapsed++){

                startDate = startDate.addDays(1);

                if (!BusinessHours.isWithin(bHours.Id, startDate)){

                    startDate = BusinessHours.nextStartDate(bHours.Id, startDate);
                }
            }
            return startDate;
        }
    }
}

@isTest
    public class CaluclarDiasColombiaTest {

        /*Test.startTest();
        Test.stopTest();*/

        //System.assertEquals();

    }