public void Its_lists_past_meetups()
        {
            var pastMeetup = MeetupFactory.PastMeetup();

            meetupRepository.Add(pastMeetup);

            var upcomingMeetup = MeetupFactory.UpcomingMeetup();

            meetupRepository.Add(upcomingMeetup);

            var pastMeetups = meetupRepository.GetPastMeetups(DateTime.Now);

            pastMeetups.ShouldBeEquivalentTo(new [] { pastMeetup });
        }