how can i test a win32com python script that connects to outlook?

I wrote a small python script that gets items within a date range from a shared calendar. I considered making a test calendar and sharing it with myself but then the tests would fail for anyone without permission to view the calendar. it seems to work fine but since it needs to connect to a shared calendar, how would I write tests for it?

this is the code:

import csv
import datetime
import win32com.client

class SharedCalendarSurrogate(object):
    ''' '''

  def __init__(self, recipient):
    ''' '''
    outlook = win32com.client.Dispatch('Outlook.Application')
    namespace = outlook.GetNamespace('MAPI')
    recipient = namespace.createRecipient(recipient)
    resolved = recipient.Resolve()
    if resolved is True:
        self.shared_calendar = namespace.GetSharedDefaultFolder(recipient, 9)
    else:
        raise ValueError('Failed to resolve recipient')

  def get_appointments(self):
    ''' '''
    self.appointments = self.shared_calendar.Items

  def sort_appointments(self):
    ''' '''
    self.appointments.sort('[Start]')

  def include_recurrences(self):
    ''' '''
    self.appointments.IncludeRecurrences = 'True'

  def filter_appointments(self, filter_string):
    ''' '''
    self.filter_string = filter_string
    self.appointments = self.appointments.Restrict(filter_string)

  def filter_appointments_by_date_range(self, date_range, delimiter='-'):
    ''' '''
    dates = [datetime.datetime.strptime(date, '%m/%d/%Y') for date in date_range.split(delimiter)]
    begin = datetime.datetime.strftime(min(dates), '%m/%d/%Y')
    end = datetime.datetime.strftime(max(dates), '%m/%d/%Y')
    filter_string = "[Start] >= '%s' AND [End] <= '%s'" % (begin, end)
    self.filter_appointments(filter_string)

  def generate_appointment_details(self):
    ''' '''
    self.appointment_details = ((appointment.Start, appointment.End, appointment.Organizer, appointment.Subject.encode('utf-8'),
                            appointment.Body.encode('utf-8'))
                            for appointment in self.appointments)

  def export_to_csv(self, file):
    ''' '''
    with open(file, 'wb') as f:
        writer = csv.writer(f)
        writer.writerows(self.appointment_details)

if __name__ == '__main__':
    import argparse
    parser = argparse.ArgumentParser()
    parser.add_argument('recipient', help='the shared calendar you want to pull appointments from.')
    parser.add_argument('-r', '--daterange', help='include appointments within the date range.')
    parser.add_argument('--includerecurrences', help='include recurrences')
    args = parser.parse_args()

    shared_calendar = SharedCalendarSurrogate(recipient=args.recipient)
    shared_calendar.get_appointments()
    if args.includerecurrences == True:
      shared_calendar.include_recurrences()
    shared_calendar.sort_appointments()
    if args.daterange:
    shared_calendar.filter_appointments_by_date_range(date_range=args.daterange)
    if args.organizer:
      shared_calendar.filter_appointments_by_organizer(organizer=args.organizer)
    shared_calendar.generate_appointment_details()
    shared_calendar.export_to_csv('%s_appointments.csv' % args.recipient)