public void Should_Succes_When_AddingPhoto_ToMeetup()
        {
            var meetup = new Meetup(
                organizerId: "123",
                subject: "DDD",
                when: DateTime.Now.AddDays(1),
                description: "DDD Practices",
                location: new Location("YTÜ Teknopark"),
                policy: meetupPolicy);

            meetup.Complete();

            meetup.AddPhoto("photo.jpg");

            Assert.Single(meetup.Photos);
        }
        public void Should_ThrowException_When_AddingPhoto_ToNotCompletedMeetup()
        {
            var exception = Assert.Throws <MeetupDomainException>(() =>
            {
                var meetup = new Meetup(
                    organizerId: "123",
                    subject: "DDD",
                    when: DateTime.Now.AddDays(1),
                    description: "DDD Practices",
                    location: new Location("YTÜ Teknopark"),
                    policy: meetupPolicy);

                meetup.AddPhoto("photo.jpg");
            });

            Assert.Equal("Meetup is not completed", exception.Message);
        }