Optimistic Concurrency in RavenDB

gistfile1.txt

[Subject("Raven Experiments")]
public class when_storing_two_objects_with_same_id_in_separate_sessions : raven_persistence_context
{
    static Exception Exception;

    Because of = () => Exception = Catch.Exception(CreateTwoObjectsInTwoSessions);
    It should_throw_concurrency_exception = () => Exception.ShouldBeOfType<ConcurrencyException>();

    static void CreateTwoObjectsInTwoSessions()
    {
        using (var session = Store.OpenSession())
        {
            StoreOnce(session, "first");
        }
        using (var session = Store.OpenSession())
        {
            StoreOnce(session, "another first");
        }
    }

    static void StoreOnce(IDocumentSession session, string text)
    {
        session.Advanced.UseOptimisticConcurrency = true;
        session.Store(new MyEvent {Revision = 1, Payload = text});
        session.SaveChanges();
    }

    public class MyEvent
    {
        public int Id { get { return Revision; } }
        public int Revision { get; set; }
        public string Payload { get; set; }
    }
}