public void Should_create_attendee_association_when_registering_for_an_event()
{
var conference = new Conference("Austin Code Camp");
var attendee = new Attendee("Joe", "Schmoe");
attendee.RegisterFor(conference);
attendee.Conference.ShouldEqual(conference);
conference.GetAttendees().Any(a => a == attendee).ShouldBeTrue();
}