Spec.cs

 [Subject("Inviting known users")]
    public class When_adding_a_member_that_already_has_a_open_invite_for_institution : HandlerConcern<InviteMemberToInstitutionEntitlementHandler>
    {
        static readonly string email = "email@server,com";
        static readonly Guid institutionEntitlementId = Guid.NewGuid();

        Establish context = () =>
            {
                session.Store(new EntitlementInvitationsView
                                  {
                                      InstitutionEntitlementId = institutionEntitlementId,
                                      Accepted = true,
                                      Email = email
                                  });

                session.SaveChanges();

            };

        Because of = () =>
                    Subject.Consume(new InviteMemberToInstitutionEntitlement
                                        {
                                            Email = email,
                                            InstitutionEntitlementId = institutionEntitlementId
                                        });

        It should_not_invite_the_member = () =>
                                          ShouldNotStoreAggregate();



    }
}