rmux-server 0.1.1

Tokio daemon and request dispatcher for the RMUX terminal multiplexer.
Documentation 
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use super::*;

#[tokio::test]
async fn choose_tree_zw_runs_direct_command_only_on_accept() {
    let handler = RequestHandler::new();
    let attach_pid = std::process::id();
    let alpha = SessionName::new("alpha").expect("valid session");

    assert!(matches!(
        handler
            .handle(Request::NewSession(NewSessionRequest {
                session_name: alpha.clone(),
                detached: true,
                size: Some(TerminalSize { cols: 80, rows: 24 }),
                environment: None,
            }))
            .await,
        Response::NewSession(_)
    ));

    let (control_tx, _control_rx) = mpsc::unbounded_channel();
    let _ = handler
        .register_attach(attach_pid, alpha.clone(), control_tx)
        .await;

    let parsed = CommandParser::new()
        .parse_arguments(["choose-tree", "-Zw", "set-buffer", "-b", "chosen", "%%"])
        .expect("choose-tree parses");
    let command = RequestHandler::parse_mode_tree_queue_command(parsed.commands()[0].clone())
        .expect("mode-tree command parses")
        .expect("mode-tree command recognized");

    handler
        .execute_queued_mode_tree(
            attach_pid,
            command,
            &QueueExecutionContext::without_caller_cwd(),
        )
        .await
        .expect("overlay opens");

    {
        let state = handler.state.lock().await;
        assert!(
            state.buffers.get("chosen").is_none(),
            "direct command must not run before accept"
        );
    }

    handler
        .accept_mode_tree_selection(attach_pid)
        .await
        .expect("selection accept succeeds");

    let state = handler.state.lock().await;
    let chosen = state
        .buffers
        .get("chosen")
        .expect("buffer created on accept");
    assert_eq!(String::from_utf8_lossy(chosen), "=alpha:0.");
}

#[tokio::test]
async fn choose_client_from_unattached_request_activates_mode_tree_on_all_attaches() {
    let handler = RequestHandler::new();
    let alpha = SessionName::new("alpha").expect("valid session");

    assert!(matches!(
        handler
            .handle(Request::NewSession(NewSessionRequest {
                session_name: alpha.clone(),
                detached: true,
                size: Some(TerminalSize { cols: 80, rows: 24 }),
                environment: None,
            }))
            .await,
        Response::NewSession(_)
    ));

    let (first_tx, _first_rx) = mpsc::unbounded_channel();
    let (second_tx, _second_rx) = mpsc::unbounded_channel();
    let first_pid = std::process::id();
    let second_pid = first_pid.saturating_add(1);
    let _ = handler
        .register_attach(first_pid, alpha.clone(), first_tx)
        .await;
    let _ = handler.register_attach(second_pid, alpha, second_tx).await;

    let parsed = CommandParser::new()
        .parse_arguments(["choose-client"])
        .expect("choose-client parses");
    let command = RequestHandler::parse_mode_tree_queue_command(parsed.commands()[0].clone())
        .expect("mode-tree command parses")
        .expect("mode-tree command recognized");

    handler
        .execute_queued_mode_tree(
            first_pid.saturating_add(10),
            command,
            &QueueExecutionContext::without_caller_cwd(),
        )
        .await
        .expect("overlay opens");

    let active_attach = handler.active_attach.lock().await;
    assert!(active_attach
        .by_pid
        .get(&first_pid)
        .and_then(|active| active.mode_tree.as_ref())
        .is_some());
    assert!(active_attach
        .by_pid
        .get(&second_pid)
        .and_then(|active| active.mode_tree.as_ref())
        .is_some());
}

#[tokio::test]
async fn choose_tree_zw_defers_parse_errors_until_accept() {
    let handler = RequestHandler::new();
    let attach_pid = std::process::id();
    let alpha = SessionName::new("alpha").expect("valid session");

    assert!(matches!(
        handler
            .handle(Request::NewSession(NewSessionRequest {
                session_name: alpha.clone(),
                detached: true,
                size: Some(TerminalSize { cols: 80, rows: 24 }),
                environment: None,
            }))
            .await,
        Response::NewSession(_)
    ));

    let (control_tx, _control_rx) = mpsc::unbounded_channel();
    let _ = handler.register_attach(attach_pid, alpha, control_tx).await;

    let parsed = CommandParser::new()
        .parse_arguments(["choose-tree", "-Zw", "{"])
        .expect("choose-tree parses");
    let command = RequestHandler::parse_mode_tree_queue_command(parsed.commands()[0].clone())
        .expect("mode-tree command parses")
        .expect("mode-tree command recognized");

    handler
        .execute_queued_mode_tree(
            attach_pid,
            command,
            &QueueExecutionContext::without_caller_cwd(),
        )
        .await
        .expect("overlay opens despite invalid direct command");

    let err = handler
        .accept_mode_tree_selection(attach_pid)
        .await
        .expect_err("parse error should surface when accepting");
    let RmuxError::Server(message) = err else {
        panic!("expected server parse error");
    };
    assert!(message.starts_with("mode-tree command parse failed:"));
}