Add basic session tests

    assert!(CALLED_BACK.load(Ordering::SeqCst));

}

#[test]

fn idle_session() {

    let ctx = SslContext::builder(SslMethod::tls()).unwrap().build();

    let ssl = Ssl::new(&ctx).unwrap();

    assert!(ssl.session().is_none());

}

#[test]

fn active_session() {

    let connector = SslConnectorBuilder::new(SslMethod::tls()).unwrap().build();

    let s = TcpStream::connect("google.com:443").unwrap();

    let socket = connector.connect("google.com", s).unwrap();

    assert!(socket.ssl().session().is_some());

}

fn _check_kinds() {

    fn is_send<T: Send>() {}

    fn is_sync<T: Sync>() {}