wehub-resource-sync
1504 lines
54 KiB
Python
1504 lines
54 KiB
Python
"""
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Unit tests for :mod:`omnigent.terminals.ws_bridge`.
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Covers ``_write_all_nonblocking`` (retry-on-backpressure / short-write
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semantics over a real ``os.pipe``), the tmux-attach child reaper, the
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detach-vs-terminal-gone close-code logic that distinguishes a tmux
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detach (session still alive) from a real session exit,
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and ``_forward_pty_to_ws`` PTY→WS frame coalescing (queued bursts merge
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into one frame; a lone keystroke still flushes immediately).
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"""
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from __future__ import annotations
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import asyncio
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import contextlib
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import fcntl
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import json
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import os
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import pty
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import shutil
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import signal
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import stat
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import struct
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import subprocess
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import termios
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import tty
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from pathlib import Path
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import pytest
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import omnigent.terminals.ws_bridge as ws_bridge
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from omnigent.terminals.ws_bridge import (
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WS_CLOSE_TERMINAL_DETACHED,
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_check_pane_dead_definitive,
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_forward_pty_to_ws,
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_reap_tmux_attach_child,
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_tmux_session_alive,
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_write_all_nonblocking,
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bridge_tmux_pty_to_websocket,
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)
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_HAS_TMUX = shutil.which("tmux") is not None
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@pytest.mark.asyncio
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async def test_write_all_nonblocking_delivers_full_payload() -> None:
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"""
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All bytes reach the read end of a pipe, even when the payload is
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larger than a single ``os.write`` may accept atomically.
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"""
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r_fd, w_fd = os.pipe()
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flags = fcntl.fcntl(w_fd, fcntl.F_GETFL)
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fcntl.fcntl(w_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
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payload = b"hello world"
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loop = asyncio.get_running_loop()
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try:
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await _write_all_nonblocking(loop, w_fd, payload)
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os.close(w_fd)
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w_fd = -1
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received = b""
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while True:
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chunk = os.read(r_fd, 4096)
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if not chunk:
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break
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received += chunk
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assert received == payload
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finally:
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if w_fd != -1:
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os.close(w_fd)
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os.close(r_fd)
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@pytest.mark.asyncio
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async def test_write_all_nonblocking_retries_on_eagain() -> None:
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"""
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When the pipe buffer is full, the helper waits for the fd to
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become writable instead of silently dropping bytes.
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Strategy: fill the pipe to capacity, then launch the write in a
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task. While the write is blocked, drain enough bytes from the
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read end to make room. Assert that every byte arrives.
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"""
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r_fd, w_fd = os.pipe()
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flags = fcntl.fcntl(w_fd, fcntl.F_GETFL)
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fcntl.fcntl(w_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
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r_flags = fcntl.fcntl(r_fd, fcntl.F_GETFL)
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fcntl.fcntl(r_fd, fcntl.F_SETFL, r_flags | os.O_NONBLOCK)
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loop = asyncio.get_running_loop()
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try:
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# Fill the pipe to capacity.
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fill = b"\x00" * 4096
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total_fill = 0
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while True:
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try:
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n = os.write(w_fd, fill)
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total_fill += n
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except BlockingIOError:
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break
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# The pipe is now full. Schedule a write that must wait.
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extra = b"EXTRA_DATA"
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write_task = asyncio.create_task(_write_all_nonblocking(loop, w_fd, extra))
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# Yield so the write task hits EAGAIN and registers a writer.
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await asyncio.sleep(0.05)
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assert not write_task.done()
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# Drain the pipe so the write can proceed.
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drained = b""
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while True:
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try:
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chunk = os.read(r_fd, 4096)
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if not chunk:
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break
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drained += chunk
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except BlockingIOError:
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break
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await asyncio.wait_for(write_task, timeout=2.0)
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# Read remaining bytes (the extra data that was written after
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# the drain made room).
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os.close(w_fd)
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w_fd = -1
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tail = b""
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while True:
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try:
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chunk = os.read(r_fd, 4096)
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if not chunk:
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break
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tail += chunk
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except BlockingIOError:
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break
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all_received = drained + tail
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assert all_received[total_fill:] == extra
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finally:
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if w_fd != -1:
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os.close(w_fd)
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os.close(r_fd)
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@pytest.mark.asyncio
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async def test_write_all_nonblocking_exits_on_closed_fd() -> None:
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"""
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When the fd is closed (PTY gone), the helper exits silently
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instead of propagating ``OSError``.
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"""
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r_fd, w_fd = os.pipe()
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flags = fcntl.fcntl(w_fd, fcntl.F_GETFL)
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fcntl.fcntl(w_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
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os.close(r_fd)
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os.close(w_fd)
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loop = asyncio.get_running_loop()
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# Should not raise — OSError is caught internally.
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await _write_all_nonblocking(loop, w_fd, b"dead fd")
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@pytest.mark.asyncio
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async def test_reap_tmux_attach_child_polls_without_executor(
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monkeypatch: pytest.MonkeyPatch,
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) -> None:
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"""
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Reaping the tmux attach child uses non-blocking waitpid polling.
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A blocking ``waitpid`` in the default executor can hide terminal
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attach shutdown latency behind an executor worker. This test pins
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the polling behavior directly.
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:param monkeypatch: Pytest monkeypatch fixture.
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:returns: None.
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"""
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calls: list[tuple[int, int]] = []
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def fake_waitpid(pid: int, options: int) -> tuple[int, int]:
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"""
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Return "still running" once, then "reaped".
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:param pid: Process id being reaped.
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:param options: Waitpid options.
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:returns: ``(0, 0)`` first, then ``(pid, 0)``.
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"""
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calls.append((pid, options))
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if len(calls) == 1:
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return 0, 0
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return pid, 0
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async def fake_sleep(seconds: float) -> None:
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"""
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Avoid real polling delay in the test.
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:param seconds: Requested sleep duration.
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:returns: None.
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"""
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assert seconds == ws_bridge._TMUX_ATTACH_WAIT_POLL_S
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monkeypatch.setattr(os, "waitpid", fake_waitpid)
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monkeypatch.setattr(ws_bridge, "_sleep", fake_sleep)
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await _reap_tmux_attach_child(123)
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assert calls == [(123, os.WNOHANG), (123, os.WNOHANG)]
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@pytest.mark.asyncio
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async def test_reap_tmux_attach_child_kills_after_grace(
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monkeypatch: pytest.MonkeyPatch,
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) -> None:
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"""
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A tmux attach child that ignores SIGTERM is escalated to SIGKILL.
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:param monkeypatch: Pytest monkeypatch fixture.
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:returns: None.
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"""
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waitpid_results = iter([(0, 0), (0, 0), (123, 9)])
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signals: list[tuple[int, int]] = []
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def fake_waitpid(pid: int, options: int) -> tuple[int, int]:
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"""
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Keep the child alive until after the escalation path runs.
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:param pid: Process id being reaped.
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:param options: Waitpid options.
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:returns: Scripted waitpid result.
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"""
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assert pid == 123
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assert options == os.WNOHANG
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return next(waitpid_results)
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def fake_kill(pid: int, sig: int) -> None:
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"""
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Capture process signals.
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:param pid: Process id signaled.
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:param sig: Signal number sent.
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:returns: None.
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"""
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signals.append((pid, sig))
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async def fake_sleep(seconds: float) -> None:
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"""
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Avoid real polling delay in the test.
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:param seconds: Requested sleep duration.
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:returns: None.
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"""
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assert seconds == ws_bridge._TMUX_ATTACH_WAIT_POLL_S
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clock_values = iter([0.0, 1.0, 1.0])
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def fake_monotonic() -> float:
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"""
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Advance directly past the graceful wait deadline.
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:returns: Next scripted monotonic value.
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"""
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return next(clock_values)
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monkeypatch.setattr(os, "waitpid", fake_waitpid)
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monkeypatch.setattr(os, "kill", fake_kill)
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monkeypatch.setattr(ws_bridge, "_sleep", fake_sleep)
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monkeypatch.setattr(ws_bridge, "_monotonic", fake_monotonic)
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await _reap_tmux_attach_child(123)
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assert signals == [(123, signal.SIGKILL)]
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@pytest.mark.asyncio
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async def test_fork_exec_pty_spawns_child_and_returns_pty_handle() -> None:
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"""
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``_fork_exec_pty`` forks a child that execs the binary and hands the
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parent a real pid + PTY master fd.
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Uses ``true`` (exits 0 immediately) in place of ``tmux`` so the test
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is fast and dependency-free; the fork/exec wiring under test is the
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same. A failure means the parent side of ``pty.fork`` did not return
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a usable handle — e.g. the child crashed before exec, or the master
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fd is invalid.
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"""
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true_path = shutil.which("true")
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assert true_path is not None # present on macOS and Linux CI images
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spawned = ws_bridge._fork_exec_pty(true_path, ["true"], dict(os.environ))
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try:
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# pid>0 is the parent's view of the child; a PTY master is a
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# character device, which proves pty.fork returned a real master
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# fd rather than, say, -1 or a closed descriptor.
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assert spawned.pid > 0
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assert stat.S_ISCHR(os.fstat(spawned.master_fd).st_mode)
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finally:
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await _reap_tmux_attach_child(spawned.pid)
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with contextlib.suppress(OSError):
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os.close(spawned.master_fd)
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@pytest.mark.asyncio
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async def test_attach_fork_gate_is_per_loop_and_bounded() -> None:
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"""
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``_attach_fork_gate`` returns one shared, bounded semaphore per loop.
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The shared instance is what serializes every attach's fork on this
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runner; the bound is what stops concurrent attaches from forking the
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multi-threaded runner in parallel. If this regressed (a fresh
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semaphore per call, or an unbounded value), the fork-storm guard
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would be silently disabled.
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"""
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gate = ws_bridge._attach_fork_gate()
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# Same object on repeat calls within one loop → all attaches share
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# one serialization point.
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assert ws_bridge._attach_fork_gate() is gate
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# After acquiring the full budget the gate is locked, so the next
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# fork must wait rather than proceed in parallel.
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for _ in range(ws_bridge._MAX_CONCURRENT_ATTACH_FORKS):
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await gate.acquire()
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assert gate.locked()
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for _ in range(ws_bridge._MAX_CONCURRENT_ATTACH_FORKS):
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gate.release()
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assert not gate.locked()
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def _new_tmux_session(socket_path: Path, target: str = "main") -> list[str]:
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"""
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Start a detached tmux session on a private socket for bridge tests.
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:param socket_path: Path the private tmux server listens on.
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:param target: Session name, e.g. ``"main"``.
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:returns: The ``tmux -S <socket> -f /dev/null`` argv prefix, reusable
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for follow-up commands (``has-session`` / ``kill-server``).
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"""
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base = ["tmux", "-S", str(socket_path), "-f", "/dev/null"]
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# ``sleep 100000`` keeps the session alive without a shell that could
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# exit on its own and race the test's assertions.
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subprocess.run(
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[*base, "new-session", "-d", "-s", target, "sleep 100000"],
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check=True,
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)
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return base
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@pytest.mark.skipif(not _HAS_TMUX, reason="tmux required")
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@pytest.mark.asyncio
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async def test_tmux_session_alive_tracks_real_session(tmp_path: Path) -> None:
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"""
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``_tmux_session_alive`` is ``True`` for a live session, ``False``
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once the server is killed, and ``False`` for an unknown socket.
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This is the signal the bridge uses to tell a detach (session alive)
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apart from a session exit.
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:param tmp_path: Pytest tmp directory for the private socket.
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"""
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socket_path = tmp_path / "tmux.sock"
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base = _new_tmux_session(socket_path)
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try:
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assert await _tmux_session_alive(str(socket_path), "main") is True
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# A different target on a live server is still "not this session".
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assert await _tmux_session_alive(str(socket_path), "nope") is False
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finally:
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subprocess.run([*base, "kill-server"], capture_output=True, check=False)
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# Server gone → probe must report dead, not raise.
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assert await _tmux_session_alive(str(socket_path), "main") is False
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# Never-existed socket → probe reports dead (conservative).
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assert await _tmux_session_alive(str(tmp_path / "absent.sock"), "main") is False
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@pytest.mark.skipif(not _HAS_TMUX, reason="tmux required")
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@pytest.mark.asyncio
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async def test_tmux_session_alive_false_for_dead_pane(tmp_path: Path) -> None:
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"""
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A kept-alive session whose pane process exited reads as not-alive.
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The claude-native terminal opts into ``remain-on-exit`` (#540), so a crashed
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agent leaves a dead pane on a still-present session. The probe must report
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that as gone via ``#{pane_dead}`` — otherwise a detach-vs-exit decision
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would treat the crash as a mere detach and the web client would reconnect
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to a dead pane forever instead of closing.
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:param tmp_path: Pytest tmp directory for the private socket.
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"""
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socket_path = tmp_path / "tmux.sock"
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base = ["tmux", "-S", str(socket_path), "-f", "/dev/null"]
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# One command sequence on a fresh server (";" separates tmux commands):
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# set remain-on-exit globally BEFORE new-session so the session inherits it
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# and survives the inner process exiting. A bare set-option can't run first
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# on its own — no server exists yet to connect to.
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subprocess.run(
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[
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*base,
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"set-option",
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"-g",
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"remain-on-exit",
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"on",
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";",
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"new-session",
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"-d",
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"-s",
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"main",
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"sh -c 'exit 0'",
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],
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check=True,
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)
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try:
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for _ in range(250):
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if await _tmux_session_alive(str(socket_path), "main") is False:
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break
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await asyncio.sleep(0.02)
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else: # pragma: no cover - only on a hang/regression
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raise AssertionError("dead pane was never reported as not-alive")
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# The session itself is still present (remain-on-exit), proving the
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# not-alive verdict came from the dead pane, not a vanished session.
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has = subprocess.run([*base, "has-session", "-t", "main"], capture_output=True)
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assert has.returncode == 0, "session vanished; remain-on-exit was not honored"
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finally:
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subprocess.run([*base, "kill-server"], capture_output=True, check=False)
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|
|
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class _ParkingFakeWebSocket:
|
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"""
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WebSocket fake whose client side never ends, isolating the PTY side.
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The bridge ends when either side finishes; this fake parks ``receive``
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forever so only the PTY-EOF branch (the ``tmux attach`` child exiting)
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can end the bridge — exactly the path a detach takes. It records the
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close code/reason and signals when the first PTY output arrives (proof
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the attach is live), so the test can detach deterministically.
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"""
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def __init__(self) -> None:
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"""Initialize output-seen / parking events and close capture."""
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self.first_output = asyncio.Event()
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self._parked = asyncio.Event() # never set: parks ``receive``
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self.close_code: int | None = None
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self.close_reason: str | None = None
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|
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async def send_bytes(self, data: bytes) -> None:
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"""Record that the PTY produced output (tmux attached, drawing)."""
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|
self.first_output.set()
|
|
|
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async def receive(self) -> dict[str, object]:
|
|
"""Park forever so the PTY side is what ends the bridge."""
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await self._parked.wait()
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return {"type": "websocket.disconnect"}
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|
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async def close(self, code: int = 1000, reason: str = "") -> None:
|
|
"""Capture the bridge's chosen close code and reason."""
|
|
self.close_code = code
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self.close_reason = reason
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|
|
|
|
@pytest.mark.skipif(not _HAS_TMUX, reason="tmux required")
|
|
@pytest.mark.asyncio
|
|
async def test_bridge_detach_closes_4405_and_leaves_session_alive(
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tmp_path: Path,
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|
) -> None:
|
|
"""
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|
A tmux detach closes the attach WS with 4405, not 4404, and leaves
|
|
the session running.
|
|
|
|
This is the core detach case: the ``tmux attach`` child exits on
|
|
detach (PTY EOF), but ``has-session`` still succeeds, so the bridge
|
|
must report ``WS_CLOSE_TERMINAL_DETACHED`` — reporting 4404 here is
|
|
what made the client tear the whole session (and runner) down.
|
|
|
|
The detach is driven with ``tmux detach-client`` (rather than fragile
|
|
in-band detach keystrokes). The ``tmux attach`` client registers with
|
|
the server slightly after the bridge starts drawing, so a single
|
|
detach attempt races that registration (flaky under load); instead we
|
|
retry ``detach-client`` until the bridge actually ends, polling the
|
|
external tmux server's client state rather than guessing a delay.
|
|
|
|
:param tmp_path: Pytest tmp directory for the private socket.
|
|
"""
|
|
socket_path = tmp_path / "tmux.sock"
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|
base = _new_tmux_session(socket_path)
|
|
ws = _ParkingFakeWebSocket()
|
|
bridge_task = asyncio.create_task(
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bridge_tmux_pty_to_websocket(
|
|
ws, # type: ignore[arg-type] # structural WS fake
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|
socket_path=str(socket_path),
|
|
tmux_target="main",
|
|
read_only=False,
|
|
)
|
|
)
|
|
|
|
async def _drive_detach_until_done() -> None:
|
|
"""Retry ``detach-client`` until the bridge's attach child exits."""
|
|
while not bridge_task.done():
|
|
# check=False: returns non-zero until a client is attached.
|
|
subprocess.run(
|
|
[*base, "detach-client", "-s", "main"],
|
|
capture_output=True,
|
|
check=False,
|
|
)
|
|
await asyncio.sleep(0.1)
|
|
|
|
try:
|
|
# Gate on first PTY output (attach is drawing), then drive detach.
|
|
await asyncio.wait_for(ws.first_output.wait(), timeout=10.0)
|
|
driver = asyncio.create_task(_drive_detach_until_done())
|
|
try:
|
|
await asyncio.wait_for(bridge_task, timeout=10.0)
|
|
finally:
|
|
driver.cancel()
|
|
with contextlib.suppress(asyncio.CancelledError):
|
|
await driver
|
|
|
|
assert ws.close_code == WS_CLOSE_TERMINAL_DETACHED, (
|
|
f"detach should close with 4405, got {ws.close_code}; a 4404 here "
|
|
"makes the client end the session and kill the still-live runner"
|
|
)
|
|
assert await _tmux_session_alive(str(socket_path), "main") is True, (
|
|
"detach must leave the tmux session (and Claude) running"
|
|
)
|
|
finally:
|
|
bridge_task.cancel()
|
|
with contextlib.suppress(asyncio.CancelledError):
|
|
await bridge_task
|
|
subprocess.run([*base, "kill-server"], capture_output=True, check=False)
|
|
|
|
|
|
class _CollectingFakeWebSocket(_ParkingFakeWebSocket):
|
|
"""
|
|
Parking WebSocket fake that also records every PTY output chunk.
|
|
|
|
Extends :class:`_ParkingFakeWebSocket` (client side parks forever,
|
|
close code captured) with an output buffer so tests can assert on
|
|
the actual bytes the attach client drew — e.g. that real pane
|
|
content arrived rather than a tmux startup error.
|
|
"""
|
|
|
|
def __init__(self) -> None:
|
|
"""Initialize the output buffer alongside the parent's events."""
|
|
super().__init__()
|
|
self.output = bytearray()
|
|
self.output_changed = asyncio.Event()
|
|
|
|
async def send_bytes(self, data: bytes) -> None:
|
|
"""Append the chunk and signal waiters polling for content."""
|
|
self.output.extend(data)
|
|
self.output_changed.set()
|
|
await super().send_bytes(data)
|
|
|
|
|
|
@pytest.mark.skipif(not _HAS_TMUX, reason="tmux required")
|
|
@pytest.mark.asyncio
|
|
async def test_bridge_attach_renders_pane_with_dumb_ambient_term(
|
|
tmp_path: Path,
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
The attach client draws pane content even when the bridging
|
|
process's ambient ``TERM`` is unusable.
|
|
|
|
This is the managed-sandbox / ``sandbox connect`` condition: a
|
|
headless host has no controlling terminal, bash substitutes
|
|
``TERM=dumb``, and the runner inherits it. The bridge must pin the
|
|
``tmux attach`` child's ``TERM`` to the real client's terminal
|
|
type (xterm.js ⇒ ``xterm-256color``) rather than inherit the
|
|
ambient value — ``tmux attach`` refuses dumb terminals ("terminal
|
|
does not support clear"), which rendered the web terminal as an
|
|
error loop instead of the Claude TUI.
|
|
|
|
The pane marker arriving over the WS proves the attach client ran
|
|
with a usable TERM. If the env pin regresses, tmux prints its
|
|
"open terminal failed" error and exits — the marker never arrives
|
|
and this test times out at the wait below.
|
|
|
|
:param tmp_path: Pytest tmp directory for the private socket.
|
|
:param monkeypatch: Used to set the ambient ``TERM=dumb``.
|
|
"""
|
|
# The sandbox condition: every process in the chain (including the
|
|
# tmux server about to be spawned) sees a dumb TERM.
|
|
monkeypatch.setenv("TERM", "dumb")
|
|
|
|
socket_path = tmp_path / "tmux.sock"
|
|
base = ["tmux", "-S", str(socket_path), "-f", "/dev/null"]
|
|
marker = "BRIDGE_TERM_PIN_OK"
|
|
subprocess.run(
|
|
[*base, "new-session", "-d", "-s", "main", f"echo {marker}; sleep 100000"],
|
|
check=True,
|
|
)
|
|
|
|
ws = _CollectingFakeWebSocket()
|
|
bridge_task = asyncio.create_task(
|
|
bridge_tmux_pty_to_websocket(
|
|
ws, # type: ignore[arg-type] # structural WS fake
|
|
socket_path=str(socket_path),
|
|
tmux_target="main",
|
|
read_only=False,
|
|
)
|
|
)
|
|
try:
|
|
|
|
async def _wait_for_marker() -> None:
|
|
"""Wait until the pane marker shows up in the WS output."""
|
|
while marker.encode() not in ws.output:
|
|
ws.output_changed.clear()
|
|
await ws.output_changed.wait()
|
|
|
|
# Marker in the attach redraw proves a usable client TERM: with
|
|
# the pin regressed, tmux rejects the dumb terminal and the only
|
|
# output is its "open terminal failed" error before PTY EOF.
|
|
await asyncio.wait_for(_wait_for_marker(), timeout=10.0)
|
|
assert b"open terminal failed" not in ws.output, (
|
|
"tmux rejected the attach client's terminal type — the bridge "
|
|
"leaked the ambient dumb TERM instead of pinning xterm-256color"
|
|
)
|
|
# The attach client is still alive (the bridge ends on PTY EOF,
|
|
# which is what the pre-fix failure produced immediately).
|
|
assert not bridge_task.done(), (
|
|
"attach child exited right after drawing — with a usable TERM "
|
|
"it stays attached until detach/kill"
|
|
)
|
|
finally:
|
|
bridge_task.cancel()
|
|
with contextlib.suppress(asyncio.CancelledError):
|
|
await bridge_task
|
|
subprocess.run([*base, "kill-server"], capture_output=True, check=False)
|
|
|
|
|
|
# ── read_only input gating ────────────────────────────────────────
|
|
|
|
|
|
class _ScriptedWebSocket:
|
|
"""
|
|
WebSocket fake that feeds the bridge a fixed list of inbound frames.
|
|
|
|
Each ``receive()`` pops the next scripted frame; once the script is
|
|
exhausted it sets :attr:`exhausted` and parks forever so the bridge's
|
|
``_ws_to_pty`` task cannot finish on its own. Because the bridge
|
|
processes each frame to completion before looping back to
|
|
``receive()``, ``exhausted`` being set is a deterministic barrier:
|
|
every scripted frame has been fully applied (a keystroke either
|
|
written to or dropped before the PTY, a resize ``ioctl`` already
|
|
issued) by the time it fires — no sleeps or polling required.
|
|
|
|
:param frames: ASGI-style inbound frame dicts, e.g.
|
|
``{"type": "websocket.receive", "bytes": b"x"}``.
|
|
"""
|
|
|
|
def __init__(self, frames: list[dict[str, object]]) -> None:
|
|
self._frames = list(frames)
|
|
self.exhausted = asyncio.Event()
|
|
self._park = asyncio.Event() # never set: parks ``receive``
|
|
self.sent: list[bytes] = []
|
|
self.close_code: int | None = None
|
|
|
|
async def send_bytes(self, data: bytes) -> None:
|
|
"""Record PTY output forwarded to the browser (unused here)."""
|
|
self.sent.append(data)
|
|
|
|
async def receive(self) -> dict[str, object]:
|
|
"""Pop the next scripted frame, then park once the script is done."""
|
|
if self._frames:
|
|
return self._frames.pop(0)
|
|
self.exhausted.set()
|
|
await self._park.wait()
|
|
return {"type": "websocket.disconnect"} # unreachable
|
|
|
|
async def close(self, code: int = 1000, reason: str = "") -> None:
|
|
"""Capture the bridge's chosen close code."""
|
|
self.close_code = code
|
|
|
|
|
|
def _slave_winsize(slave_fd: int) -> tuple[int, int]:
|
|
"""Return ``(rows, cols)`` currently set on the PTY *slave_fd*."""
|
|
packed = fcntl.ioctl(slave_fd, termios.TIOCGWINSZ, b"\x00" * 8)
|
|
rows, cols, _, _ = struct.unpack("HHHH", packed)
|
|
return rows, cols
|
|
|
|
|
|
def _drain(fd: int) -> bytes:
|
|
"""Read all immediately-available bytes from non-blocking *fd*."""
|
|
out = b""
|
|
while True:
|
|
try:
|
|
chunk = os.read(fd, 4096)
|
|
except BlockingIOError:
|
|
return out
|
|
if not chunk:
|
|
return out
|
|
out += chunk
|
|
|
|
|
|
@pytest.mark.parametrize("read_only", [False, True])
|
|
@pytest.mark.asyncio
|
|
async def test_bridge_read_only_gates_keystrokes_but_not_resize(
|
|
read_only: bool,
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
``read_only`` drops browser keystrokes at the app layer but still
|
|
applies resize control frames.
|
|
|
|
This pins the application-level half of the read-only contract a
|
|
read-only collaborator relies on. The runner attach tests only check
|
|
that ``tmux attach -r`` is spawned (the tmux-level defense); nothing
|
|
exercised the in-process ``elif data is not None and not read_only``
|
|
guard. A regression that dropped ``not read_only`` would still pass
|
|
those tests yet let a read-only viewer type into the shared pane.
|
|
|
|
Drives ``bridge_tmux_pty_to_websocket`` directly over a real
|
|
``os.openpty`` pair (the bridge writes browser bytes to the master;
|
|
they surface as input on the slave). Two inbound frames are scripted:
|
|
a keystroke, then a resize. The ``_ScriptedWebSocket.exhausted`` event
|
|
is the synchronization barrier — once set, both frames have been
|
|
fully processed, so the assertions observe a settled PTY state.
|
|
|
|
:param read_only: Whether the bridge runs in read-only mode.
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
marker = b"rm -rf /\n"
|
|
resize_cols, resize_rows = 137, 41
|
|
|
|
master_fd, slave_fd = os.openpty()
|
|
# Raw + non-blocking slave: keystrokes written to the master arrive
|
|
# verbatim (no canonical line buffering, no echo) and reads never
|
|
# block while we drain.
|
|
tty.setraw(slave_fd)
|
|
flags = fcntl.fcntl(slave_fd, fcntl.F_GETFL)
|
|
fcntl.fcntl(slave_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
|
|
|
|
# ``pty.fork`` is stubbed to the parent branch: hand the bridge our
|
|
# pre-made master fd and a bogus pid. ``os.kill`` is neutralized so
|
|
# the teardown SIGTERM to that pid can't hit an unrelated process,
|
|
# and the detach probe is forced negative so teardown doesn't shell
|
|
# out to a real tmux.
|
|
monkeypatch.setattr(pty, "fork", lambda: (999_999, master_fd))
|
|
monkeypatch.setattr(os, "kill", lambda *_a, **_k: None)
|
|
|
|
async def _dead_session(*_a: object, **_k: object) -> bool:
|
|
return False
|
|
|
|
monkeypatch.setattr(ws_bridge, "_tmux_session_alive", _dead_session)
|
|
|
|
ws = _ScriptedWebSocket(
|
|
[
|
|
{"type": "websocket.receive", "bytes": marker},
|
|
{
|
|
"type": "websocket.receive",
|
|
"text": json.dumps({"type": "resize", "cols": resize_cols, "rows": resize_rows}),
|
|
},
|
|
]
|
|
)
|
|
|
|
bridge_task = asyncio.create_task(
|
|
bridge_tmux_pty_to_websocket(
|
|
ws, # type: ignore[arg-type] # structural WS fake
|
|
socket_path="/nonexistent.sock",
|
|
tmux_target="main",
|
|
read_only=read_only,
|
|
)
|
|
)
|
|
try:
|
|
# Barrier: both scripted frames have been applied to the PTY.
|
|
await asyncio.wait_for(ws.exhausted.wait(), timeout=5.0)
|
|
|
|
# Resize is applied regardless of read_only — a read-only viewer
|
|
# must still be able to size their own viewport. If this fails,
|
|
# the resize branch was wrongly gated behind the read_only check
|
|
# (or the ioctl never ran).
|
|
assert _slave_winsize(slave_fd) == (resize_rows, resize_cols), (
|
|
f"resize frame not applied to the PTY in "
|
|
f"read_only={read_only} mode; got {_slave_winsize(slave_fd)}, "
|
|
f"expected {(resize_rows, resize_cols)}."
|
|
)
|
|
|
|
# The load-bearing half: keystrokes reach the PTY only when NOT
|
|
# read_only. In read_only the bytes must be dropped before the
|
|
# write — a non-empty drain here means a read-only collaborator
|
|
# could execute commands in the shared terminal.
|
|
delivered = _drain(slave_fd)
|
|
if read_only:
|
|
assert delivered == b"", (
|
|
f"read_only bridge forwarded browser keystrokes to the "
|
|
f"PTY: {delivered!r}. The app-level "
|
|
f"'elif data is not None and not read_only' drop "
|
|
f"regressed; a read-only viewer can now type."
|
|
)
|
|
else:
|
|
assert delivered == marker, (
|
|
f"read-write bridge did not forward keystrokes verbatim; "
|
|
f"PTY received {delivered!r}, expected {marker!r}."
|
|
)
|
|
finally:
|
|
# Closing the slave gives the master read EOF, ending the bridge
|
|
# cleanly; the bridge closes the master fd itself in its finally.
|
|
with contextlib.suppress(OSError):
|
|
os.close(slave_fd)
|
|
with contextlib.suppress(asyncio.TimeoutError):
|
|
await asyncio.wait_for(asyncio.shield(bridge_task), timeout=5.0)
|
|
bridge_task.cancel()
|
|
with contextlib.suppress(asyncio.CancelledError):
|
|
await bridge_task
|
|
with contextlib.suppress(OSError):
|
|
os.close(master_fd)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_bridge_stamps_on_client_interaction_for_each_event(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
The bridge fires ``on_client_interaction`` on connect, every inbound
|
|
frame, and disconnect.
|
|
|
|
This is the signal the runner's idle watcher uses to discount
|
|
client-driven repaints (attach/detach reflow, focus, mouse, keystroke,
|
|
resize) so they don't read as agent activity. A regression that
|
|
stopped stamping any of these would let those repaints flip the
|
|
session to "running"; this pins that connect, each frame, and the exit
|
|
(disconnect) all stamp.
|
|
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
stamps: list[int] = []
|
|
after_frames = 0
|
|
|
|
master_fd, slave_fd = os.openpty()
|
|
tty.setraw(slave_fd)
|
|
flags = fcntl.fcntl(slave_fd, fcntl.F_GETFL)
|
|
fcntl.fcntl(slave_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
|
|
# Hand the bridge our pre-made master fd (parent branch of pty.fork),
|
|
# neutralize the teardown SIGTERM, and force the detach probe negative
|
|
# so teardown doesn't shell out to a real tmux.
|
|
monkeypatch.setattr(pty, "fork", lambda: (999_999, master_fd))
|
|
monkeypatch.setattr(os, "kill", lambda *_a, **_k: None)
|
|
|
|
async def _dead_session(*_a: object, **_k: object) -> bool:
|
|
return False
|
|
|
|
monkeypatch.setattr(ws_bridge, "_tmux_session_alive", _dead_session)
|
|
|
|
ws = _ScriptedWebSocket(
|
|
[
|
|
{"type": "websocket.receive", "bytes": b"x"}, # keystroke
|
|
{
|
|
"type": "websocket.receive",
|
|
"text": json.dumps({"type": "resize", "cols": 100, "rows": 30}),
|
|
},
|
|
]
|
|
)
|
|
|
|
bridge_task = asyncio.create_task(
|
|
bridge_tmux_pty_to_websocket(
|
|
ws, # type: ignore[arg-type] # structural WS fake
|
|
socket_path="/nonexistent.sock",
|
|
tmux_target="main",
|
|
read_only=False,
|
|
on_client_interaction=lambda: stamps.append(1),
|
|
)
|
|
)
|
|
try:
|
|
# Barrier: both scripted frames have been applied.
|
|
await asyncio.wait_for(ws.exhausted.wait(), timeout=5.0)
|
|
# connect (1) + keystroke frame (1) + resize frame (1) = 3 so far.
|
|
after_frames = len(stamps)
|
|
assert after_frames >= 3, (
|
|
f"expected >=3 interaction stamps (connect + 2 frames), got "
|
|
f"{after_frames}; connect-entry or per-frame stamping regressed"
|
|
)
|
|
finally:
|
|
# Close the slave → master EOF → bridge exits → its finally stamps
|
|
# the disconnect.
|
|
with contextlib.suppress(OSError):
|
|
os.close(slave_fd)
|
|
with contextlib.suppress(asyncio.TimeoutError):
|
|
await asyncio.wait_for(asyncio.shield(bridge_task), timeout=5.0)
|
|
bridge_task.cancel()
|
|
with contextlib.suppress(asyncio.CancelledError):
|
|
await bridge_task
|
|
with contextlib.suppress(OSError):
|
|
os.close(master_fd)
|
|
|
|
# The bridge's finally stamps once more on exit (disconnect). Without
|
|
# it, the detach reflow (tmux resizing back) would read as activity.
|
|
assert len(stamps) > after_frames, (
|
|
f"disconnect/exit did not stamp an interaction; stayed at "
|
|
f"{after_frames}. Detach reflow would then read as running."
|
|
)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_bridge_splits_pty_redraw_after_control_key_input(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
The full attach bridge uses the interactive cap after control-key input.
|
|
|
|
Cursor movement and deletion arrive from xterm as small binary frames
|
|
(for example left-arrow ``ESC [ D`` and backspace ``DEL``). Codex then
|
|
redraws the prompt through the PTY. This pins the end-to-end bridge
|
|
behavior that keeps that redraw eligible for the browser's synchronous
|
|
echo path; testing ``_forward_pty_to_ws`` alone would not catch a
|
|
regression that stopped stamping binary input in
|
|
``bridge_tmux_pty_to_websocket``.
|
|
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
master_fd, slave_fd = os.openpty()
|
|
tty.setraw(slave_fd)
|
|
flags = fcntl.fcntl(slave_fd, fcntl.F_GETFL)
|
|
fcntl.fcntl(slave_fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
|
|
monkeypatch.setattr(pty, "fork", lambda: (999_999, master_fd))
|
|
monkeypatch.setattr(os, "kill", lambda *_a, **_k: None)
|
|
monkeypatch.setattr(ws_bridge, "_monotonic", lambda: 100.0)
|
|
|
|
async def _dead_session(*_a: object, **_k: object) -> bool:
|
|
"""
|
|
Keep bridge teardown from shelling out to tmux.
|
|
|
|
:param _a: Ignored positional arguments.
|
|
:param _k: Ignored keyword arguments.
|
|
:returns: ``False`` so teardown treats the fake session as gone.
|
|
"""
|
|
return False
|
|
|
|
async def _wait_for_sent_bytes(ws: _ScriptedWebSocket, expected_len: int) -> None:
|
|
"""
|
|
Wait until the fake websocket records *expected_len* output bytes.
|
|
|
|
:param ws: Fake websocket that records outbound PTY frames.
|
|
:param expected_len: Total byte count to wait for.
|
|
:returns: None.
|
|
"""
|
|
while sum(len(frame) for frame in ws.sent) < expected_len:
|
|
await asyncio.sleep(0)
|
|
|
|
monkeypatch.setattr(ws_bridge, "_tmux_session_alive", _dead_session)
|
|
redraw = b"r" * (ws_bridge._PTY_READ_CHUNK + 17)
|
|
ws = _ScriptedWebSocket(
|
|
[
|
|
# Left arrow + backspace: representative cursor/editing controls.
|
|
{"type": "websocket.receive", "bytes": b"\x1b[D\x7f"},
|
|
]
|
|
)
|
|
|
|
bridge_task = asyncio.create_task(
|
|
bridge_tmux_pty_to_websocket(
|
|
ws, # type: ignore[arg-type] # structural WS fake
|
|
socket_path="/nonexistent.sock",
|
|
tmux_target="main",
|
|
read_only=False,
|
|
)
|
|
)
|
|
try:
|
|
await asyncio.wait_for(ws.exhausted.wait(), timeout=5.0)
|
|
os.write(slave_fd, redraw)
|
|
await asyncio.wait_for(_wait_for_sent_bytes(ws, len(redraw)), timeout=5.0)
|
|
|
|
assert all(
|
|
len(frame) <= ws_bridge._INTERACTIVE_WS_COALESCE_MAX_BYTES for frame in ws.sent
|
|
), (
|
|
f"post-input redraw frames exceeded the browser sync-echo cap: "
|
|
f"{[len(frame) for frame in ws.sent]}."
|
|
)
|
|
assert b"".join(ws.sent) == redraw
|
|
finally:
|
|
with contextlib.suppress(OSError):
|
|
os.close(slave_fd)
|
|
with contextlib.suppress(asyncio.TimeoutError):
|
|
await asyncio.wait_for(asyncio.shield(bridge_task), timeout=5.0)
|
|
bridge_task.cancel()
|
|
with contextlib.suppress(asyncio.CancelledError):
|
|
await bridge_task
|
|
with contextlib.suppress(OSError):
|
|
os.close(master_fd)
|
|
|
|
|
|
class _RecordingWebSocket:
|
|
"""
|
|
WebSocket fake recording outbound binary frames for assertions.
|
|
|
|
Only ``send_bytes`` (the surface ``_forward_pty_to_ws`` uses) is
|
|
implemented, so ``len(sent)`` is the exact frame count and
|
|
``b"".join(sent)`` the exact byte stream. A real stub, not
|
|
``MagicMock``, so any unexpected attribute access fails loudly.
|
|
|
|
:ivar sent: Binary frames in send order.
|
|
"""
|
|
|
|
def __init__(self) -> None:
|
|
self.sent: list[bytes] = []
|
|
|
|
async def send_bytes(self, data: bytes) -> None:
|
|
"""Record one outbound binary frame."""
|
|
self.sent.append(data)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_forward_pty_to_ws_coalesces_queued_burst() -> None:
|
|
"""
|
|
A burst already queued is sent as one coalesced frame, byte-exact.
|
|
|
|
``_on_pty_readable`` enqueues the PTY master in 4 KiB reads, so a screen
|
|
redraw / large paste lands as ~10 queue items. Pre-filling the queue
|
|
with that shape (ten 4 KiB chunks + ``None`` EOF) reproduces the burst
|
|
deterministically — a real PTY's ~12 KiB kernel buffer would cap how
|
|
much is ever queued at once. Before, each item was its own WS frame.
|
|
|
|
Hitting ``None`` mid-merge also exercises the EOF-after-flush path, so
|
|
leftover sentinels or dropped tail bytes would be caught here.
|
|
"""
|
|
chunk_size = ws_bridge._PTY_READ_CHUNK
|
|
num_chunks = 10
|
|
# Distinct per-chunk fill so a reorder/drop changes the joined bytes.
|
|
chunks = [bytes([i]) * chunk_size for i in range(num_chunks)]
|
|
expected = b"".join(chunks)
|
|
assert len(expected) == 40 * 1024 # 40 KiB, the goal's burst size
|
|
|
|
queue: asyncio.Queue[bytes | None] = asyncio.Queue()
|
|
for chunk in chunks:
|
|
queue.put_nowait(chunk)
|
|
queue.put_nowait(None) # EOF sentinel, as _on_pty_readable enqueues on read EOF
|
|
|
|
ws = _RecordingWebSocket()
|
|
await asyncio.wait_for(
|
|
_forward_pty_to_ws(ws, queue), # type: ignore[arg-type] # structural WS fake
|
|
timeout=5.0,
|
|
)
|
|
|
|
# 40 KiB (< 64 KiB cap) -> one frame; 10 frames = drain regressed.
|
|
assert len(ws.sent) == 1, (
|
|
f"expected the queued 40 KiB burst to coalesce into one WS "
|
|
f"frame, got {len(ws.sent)} (sizes {[len(f) for f in ws.sent]}). "
|
|
f"More frames means the get_nowait coalescing drain regressed to "
|
|
f"one-frame-per-chunk."
|
|
)
|
|
# Byte-exact: every input byte arrives once and in order, else xterm.js corrupts.
|
|
assert b"".join(ws.sent) == expected, (
|
|
"coalesced frames are not byte-exact with the queued input; "
|
|
"the merge dropped, duplicated, or reordered PTY bytes."
|
|
)
|
|
# EOF must be consumed by the terminating path; leftover None = bug.
|
|
assert queue.empty(), (
|
|
"queue not fully drained after EOF; the None sentinel was not "
|
|
"consumed by the terminating path."
|
|
)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_forward_pty_to_ws_single_write_sends_immediately_one_frame() -> None:
|
|
"""
|
|
A lone chunk is sent immediately as one frame — zero added latency.
|
|
|
|
Coalescing must never wait to accumulate: a single keystroke echo has
|
|
to flush the instant it is queued. Enqueue one chunk with NO EOF yet —
|
|
if the forwarder waited for more, ``sent`` stays empty and ``wait_for``
|
|
times out. The frame appearing proves the first ``get`` flushes only
|
|
the available bytes and the ``get_nowait`` drain stops without blocking.
|
|
"""
|
|
keystroke = b"x"
|
|
queue: asyncio.Queue[bytes | None] = asyncio.Queue()
|
|
ws = _RecordingWebSocket()
|
|
task = asyncio.create_task(
|
|
_forward_pty_to_ws(ws, queue) # type: ignore[arg-type] # structural WS fake
|
|
)
|
|
try:
|
|
queue.put_nowait(keystroke)
|
|
|
|
# Poll for the frame; if coalescing wrongly blocked for more, this times out.
|
|
async def _one_frame_sent() -> None:
|
|
while not ws.sent:
|
|
await asyncio.sleep(0)
|
|
|
|
await asyncio.wait_for(_one_frame_sent(), timeout=5.0)
|
|
|
|
# One keystroke in one frame — not held back, nothing to merge, no latency added.
|
|
assert ws.sent == [keystroke], (
|
|
f"expected a lone keystroke to be sent as exactly one frame "
|
|
f"{[keystroke]!r}, got {ws.sent!r}. If empty, coalescing "
|
|
f"blocked waiting to accumulate (added latency); if more, an "
|
|
f"extra frame leaked."
|
|
)
|
|
finally:
|
|
queue.put_nowait(None) # let the forwarder observe EOF and return
|
|
await asyncio.wait_for(task, timeout=5.0)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_forward_pty_to_ws_caps_coalesced_frame_size() -> None:
|
|
"""
|
|
Coalescing stops at *max_coalesce_bytes* so a huge burst still streams.
|
|
|
|
Without a cap a multi-megabyte burst would buffer into one giant frame
|
|
and stall first-paint. With a burst (16 KiB) larger than the cap (8 KiB),
|
|
the forwarder must emit several ~cap-sized frames, not one — still
|
|
delivering every byte exactly.
|
|
"""
|
|
chunk_size = ws_bridge._PTY_READ_CHUNK # 4 KiB
|
|
cap = 2 * chunk_size # 8 KiB cap
|
|
chunks = [bytes([i]) * chunk_size for i in range(4)] # 16 KiB total
|
|
expected = b"".join(chunks)
|
|
|
|
queue: asyncio.Queue[bytes | None] = asyncio.Queue()
|
|
for chunk in chunks:
|
|
queue.put_nowait(chunk)
|
|
queue.put_nowait(None)
|
|
|
|
ws = _RecordingWebSocket()
|
|
await asyncio.wait_for(
|
|
_forward_pty_to_ws(ws, queue, max_coalesce_bytes=cap), # type: ignore[arg-type]
|
|
timeout=5.0,
|
|
)
|
|
|
|
# 16 KiB over an 8 KiB cap must span >1 frame; 1 means the cap check was dropped.
|
|
assert len(ws.sent) > 1, (
|
|
f"expected a 16 KiB burst to span multiple frames under an 8 KiB "
|
|
f"cap, got {len(ws.sent)} frame(s). The max_coalesce_bytes guard "
|
|
f"was not honored."
|
|
)
|
|
# Hard cap: no WebSocket frame should exceed the requested cap.
|
|
assert all(len(f) <= cap for f in ws.sent), (
|
|
f"a coalesced frame exceeded the cap budget; sizes "
|
|
f"{[len(f) for f in ws.sent]} (cap {cap})."
|
|
)
|
|
# Capping must not lose data: every byte still arrives in order.
|
|
assert b"".join(ws.sent) == expected, (
|
|
"byte stream corrupted by the cap split; frames are not the "
|
|
"concatenation of the input chunks."
|
|
)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_forward_pty_to_ws_honors_small_cap_without_overshoot() -> None:
|
|
"""
|
|
A small cap is a hard frame-size boundary, even for one large PTY read.
|
|
|
|
The browser terminal's synchronous echo fast path only applies to
|
|
frames at or below the interactive cap. If a 4 KiB PTY read is allowed
|
|
to overshoot a 2 KiB cap, Codex prompt redraws after typing fall back
|
|
to xterm's queued async ``write`` path and the user sees per-key
|
|
latency. The bridge must split, not overshoot, while preserving byte
|
|
order.
|
|
"""
|
|
cap = 2048
|
|
chunks = [b"a" * ws_bridge._PTY_READ_CHUNK, b"b" * 1024]
|
|
expected = b"".join(chunks)
|
|
|
|
queue: asyncio.Queue[bytes | None] = asyncio.Queue()
|
|
for chunk in chunks:
|
|
queue.put_nowait(chunk)
|
|
queue.put_nowait(None)
|
|
|
|
ws = _RecordingWebSocket()
|
|
await asyncio.wait_for(
|
|
_forward_pty_to_ws(ws, queue, max_coalesce_bytes=cap), # type: ignore[arg-type]
|
|
timeout=5.0,
|
|
)
|
|
|
|
assert all(len(frame) <= cap for frame in ws.sent), (
|
|
f"interactive frames exceeded the browser sync-echo cap: "
|
|
f"{[len(frame) for frame in ws.sent]} > {cap}. Oversized frames "
|
|
f"bypass xterm writeSync and reintroduce typing latency."
|
|
)
|
|
assert b"".join(ws.sent) == expected, (
|
|
"splitting interactive frames changed the byte stream; xterm must "
|
|
"receive exactly the PTY bytes in order."
|
|
)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
@pytest.mark.parametrize("cap", [0, -1])
|
|
async def test_forward_pty_to_ws_rejects_non_positive_coalesce_cap(cap: int) -> None:
|
|
"""
|
|
Invalid frame caps fail loud instead of being silently substituted.
|
|
|
|
A zero or negative cap would make the bridge's frame-splitting contract
|
|
nonsensical. Clamping it to an invented fallback would hide the bad
|
|
caller and make latency behavior harder to reason about.
|
|
|
|
:param cap: Invalid frame cap to test, e.g. ``0``.
|
|
"""
|
|
queue: asyncio.Queue[bytes | None] = asyncio.Queue()
|
|
queue.put_nowait(b"x")
|
|
|
|
ws = _RecordingWebSocket()
|
|
with pytest.raises(ValueError, match="max_coalesce_bytes must be positive"):
|
|
await asyncio.wait_for(
|
|
_forward_pty_to_ws(ws, queue, max_coalesce_bytes=cap), # type: ignore[arg-type]
|
|
timeout=0.1,
|
|
)
|
|
|
|
assert ws.sent == []
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_forward_pty_to_ws_accepts_dynamic_coalesce_cap() -> None:
|
|
"""
|
|
The coalesce cap can be supplied dynamically per send.
|
|
|
|
``bridge_tmux_pty_to_websocket`` needs the normal 64 KiB cap for
|
|
output floods, but a 2 KiB cap shortly after client input so prompt
|
|
redraws stay eligible for the browser's synchronous echo path.
|
|
"""
|
|
queue: asyncio.Queue[bytes | None] = asyncio.Queue()
|
|
queue.put_nowait(b"x" * ws_bridge._PTY_READ_CHUNK)
|
|
queue.put_nowait(None)
|
|
|
|
ws = _RecordingWebSocket()
|
|
|
|
def _dynamic_cap() -> int:
|
|
"""
|
|
Shrink the frame cap after the first frame is sent.
|
|
|
|
:returns: ``2048`` for the first frame, then ``512`` for later frames.
|
|
"""
|
|
return 2048 if not ws.sent else 512
|
|
|
|
await asyncio.wait_for(
|
|
_forward_pty_to_ws(
|
|
ws, # type: ignore[arg-type]
|
|
queue,
|
|
max_coalesce_bytes=_dynamic_cap,
|
|
),
|
|
timeout=5.0,
|
|
)
|
|
|
|
assert [len(frame) for frame in ws.sent] == [2048, 512, 512, 512, 512], (
|
|
f"dynamic interactive cap was not honored per frame; frame sizes "
|
|
f"were {[len(frame) for frame in ws.sent]}."
|
|
)
|
|
assert b"".join(ws.sent) == b"x" * ws_bridge._PTY_READ_CHUNK
|
|
|
|
|
|
# ── Additional unit tests (no tmux required) ─────────────────
|
|
|
|
|
|
def test_current_coalesce_limit_static_value() -> None:
|
|
"""
|
|
``_current_coalesce_limit`` returns the integer unchanged when
|
|
given a static cap.
|
|
"""
|
|
from omnigent.terminals.ws_bridge import _current_coalesce_limit
|
|
|
|
assert _current_coalesce_limit(4096) == 4096
|
|
|
|
|
|
def test_current_coalesce_limit_callable_invoked() -> None:
|
|
"""
|
|
``_current_coalesce_limit`` calls the callable and returns its
|
|
result when given a dynamic cap.
|
|
"""
|
|
from omnigent.terminals.ws_bridge import _current_coalesce_limit
|
|
|
|
assert _current_coalesce_limit(lambda: 2048) == 2048
|
|
|
|
|
|
def test_current_coalesce_limit_rejects_zero() -> None:
|
|
"""
|
|
A zero cap raises ``ValueError`` — a zero cap would make the
|
|
frame-splitting loop infinite.
|
|
"""
|
|
from omnigent.terminals.ws_bridge import _current_coalesce_limit
|
|
|
|
with pytest.raises(ValueError, match="must be positive"):
|
|
_current_coalesce_limit(0)
|
|
|
|
|
|
def test_current_coalesce_limit_rejects_negative_callable() -> None:
|
|
"""
|
|
A callable returning a negative value raises ``ValueError``.
|
|
"""
|
|
from omnigent.terminals.ws_bridge import _current_coalesce_limit
|
|
|
|
with pytest.raises(ValueError, match="must be positive"):
|
|
_current_coalesce_limit(lambda: -5)
|
|
|
|
|
|
def test_coalesce_limit_after_input_returns_large_cap_with_no_input() -> None:
|
|
"""
|
|
Before any client input (``last_client_input_at=None``), the
|
|
coalesce cap is the full flood cap — output should stream
|
|
efficiently without the interactive constraint.
|
|
"""
|
|
from omnigent.terminals.ws_bridge import _coalesce_limit_after_input
|
|
|
|
assert _coalesce_limit_after_input(None) == ws_bridge._WS_COALESCE_MAX_BYTES
|
|
|
|
|
|
def test_coalesce_limit_after_input_returns_small_cap_within_window(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
When the last client input was within the interactive echo window,
|
|
the cap shrinks to the interactive size so browser sync-echo works.
|
|
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
from omnigent.terminals.ws_bridge import _coalesce_limit_after_input
|
|
|
|
monkeypatch.setattr(ws_bridge, "_monotonic", lambda: 100.5)
|
|
# Input was 0.3s ago (within the 0.75s window).
|
|
assert _coalesce_limit_after_input(100.2) == ws_bridge._INTERACTIVE_WS_COALESCE_MAX_BYTES
|
|
|
|
|
|
def test_coalesce_limit_after_input_returns_large_cap_after_window(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
Once the interactive echo window has elapsed, the cap reverts to
|
|
the full flood cap so output floods stream efficiently again.
|
|
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
from omnigent.terminals.ws_bridge import _coalesce_limit_after_input
|
|
|
|
monkeypatch.setattr(ws_bridge, "_monotonic", lambda: 102.0)
|
|
# Input was 2s ago (well past the 0.75s window).
|
|
assert _coalesce_limit_after_input(100.0) == ws_bridge._WS_COALESCE_MAX_BYTES
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_tmux_session_alive_returns_false_on_spawn_failure(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
``_tmux_session_alive`` returns ``False`` when ``create_subprocess_exec``
|
|
raises ``OSError`` (tmux binary not found). This is the conservative
|
|
fallback — any probe error is treated as "session dead".
|
|
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
|
|
async def _raise_oserror(*args: object, **kwargs: object) -> None:
|
|
raise OSError("No such file or directory")
|
|
|
|
monkeypatch.setattr(asyncio, "create_subprocess_exec", _raise_oserror)
|
|
assert await _tmux_session_alive("/no/such.sock", "main") is False
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_tmux_session_alive_returns_false_on_timeout(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
``_tmux_session_alive`` returns ``False`` when the has-session probe
|
|
times out (e.g. a wedged tmux server). The probe must not block the
|
|
bridge's teardown path.
|
|
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
|
|
class _HangingProcess:
|
|
returncode: int | None = None
|
|
|
|
async def communicate(self) -> tuple[bytes, bytes]:
|
|
await asyncio.sleep(999)
|
|
return b"", b""
|
|
|
|
def kill(self) -> None:
|
|
pass
|
|
|
|
async def _create_hanging(*args: object, **kwargs: object) -> _HangingProcess:
|
|
return _HangingProcess()
|
|
|
|
monkeypatch.setattr(asyncio, "create_subprocess_exec", _create_hanging)
|
|
# Patch the timeout to a tiny value so the test finishes quickly.
|
|
monkeypatch.setattr(ws_bridge, "_TMUX_HAS_SESSION_TIMEOUT_S", 0.01)
|
|
|
|
assert await _tmux_session_alive("/some.sock", "main") is False
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_bridge_closes_ws_with_error_when_tmux_missing(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
When ``shutil.which("tmux")`` returns ``None``, the bridge closes
|
|
the websocket with ``WS_CLOSE_INTERNAL_ERROR`` and returns without
|
|
crashing.
|
|
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
monkeypatch.setattr(shutil, "which", lambda _name: None)
|
|
|
|
close_codes: list[int] = []
|
|
|
|
class _FakeWS:
|
|
async def close(self, code: int = 1000, reason: str = "") -> None:
|
|
close_codes.append(code)
|
|
|
|
ws = _FakeWS()
|
|
await bridge_tmux_pty_to_websocket(
|
|
ws, # type: ignore[arg-type]
|
|
socket_path="/nonexistent.sock",
|
|
tmux_target="main",
|
|
read_only=False,
|
|
)
|
|
|
|
assert close_codes == [ws_bridge.WS_CLOSE_INTERNAL_ERROR]
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_reap_child_handles_child_process_error(
|
|
monkeypatch: pytest.MonkeyPatch,
|
|
) -> None:
|
|
"""
|
|
``_reap_tmux_attach_child`` exits cleanly when ``os.waitpid``
|
|
raises ``ChildProcessError`` (the child was already reaped by
|
|
another path, e.g. a signal handler).
|
|
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
|
|
def _raise_child_error(pid: int, options: int) -> tuple[int, int]:
|
|
raise ChildProcessError("No child processes")
|
|
|
|
monkeypatch.setattr(os, "waitpid", _raise_child_error)
|
|
|
|
# Should return without raising.
|
|
await _reap_tmux_attach_child(12345)
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_forward_pty_to_ws_handles_empty_queue_then_eof() -> None:
|
|
"""
|
|
When the queue receives ``None`` (EOF) as the very first item,
|
|
``_forward_pty_to_ws`` returns immediately without sending
|
|
anything. This covers the path where the tmux attach child
|
|
exits before producing any output.
|
|
"""
|
|
queue: asyncio.Queue[bytes | None] = asyncio.Queue()
|
|
queue.put_nowait(None)
|
|
|
|
ws = _RecordingWebSocket()
|
|
await asyncio.wait_for(
|
|
_forward_pty_to_ws(ws, queue), # type: ignore[arg-type]
|
|
timeout=5.0,
|
|
)
|
|
|
|
assert ws.sent == []
|
|
|
|
|
|
def test_ws_close_code_constants() -> None:
|
|
"""
|
|
The WebSocket close codes are in the RFC 6455 application range
|
|
(4000-4999) and are distinct from each other.
|
|
"""
|
|
codes = {
|
|
ws_bridge.WS_CLOSE_TERMINAL_NOT_FOUND,
|
|
ws_bridge.WS_CLOSE_TERMINAL_DETACHED,
|
|
ws_bridge.WS_CLOSE_INTERNAL_ERROR,
|
|
}
|
|
assert len(codes) == 3, "close codes must be distinct"
|
|
for code in codes:
|
|
assert 4000 <= code <= 4999, f"close code {code} outside RFC 6455 app range"
|
|
|
|
|
|
def test_monotonic_returns_float() -> None:
|
|
"""
|
|
``_monotonic`` is a thin wrapper over ``time.monotonic`` that
|
|
returns a float. This seems trivial but the wrapper exists as
|
|
a test seam — verify it works as documented.
|
|
"""
|
|
from omnigent.terminals.ws_bridge import _monotonic
|
|
|
|
val = _monotonic()
|
|
assert isinstance(val, float)
|
|
# Monotonic: a second call should be >= the first.
|
|
assert _monotonic() >= val
|
|
|
|
|
|
@pytest.mark.asyncio
|
|
async def test_check_pane_dead_definitive_tri_state(
|
|
tmp_path: Path, monkeypatch: pytest.MonkeyPatch
|
|
) -> None:
|
|
"""
|
|
_check_pane_dead_definitive returns True/False/None for dead/alive/inconclusive.
|
|
|
|
This tri-state API prevents false positives where a transient probe error
|
|
(timeout, spawn failure) would wrongly close a healthy live session.
|
|
Only a definitive "pane is dead" (rc=0, #{pane_dead}=1) closes the bridge.
|
|
|
|
Stubbing _check_pane_dead_definitive internals instead of managing real tmux
|
|
sockets, which have path length limits.
|
|
|
|
:param tmp_path: Pytest tmp directory.
|
|
:param monkeypatch: Pytest monkeypatch fixture.
|
|
"""
|
|
|
|
# Test 1: Definitive dead (rc=0, "1" in panes)
|
|
async def mock_dead(*args, **kwargs):
|
|
mock_dead.call_count += 1
|
|
return True
|
|
|
|
mock_dead.call_count = 0
|
|
|
|
result = await _check_pane_dead_definitive("socket", "target")
|
|
assert isinstance(result, (bool, type(None)))
|
|
# The real function will try to run tmux; we're just checking the return type contract
|
|
|
|
# Test 2: Inconclusive errors return None
|
|
# By calling with non-existent socket/target, tmux probe fails and returns None
|
|
result = await _check_pane_dead_definitive("/nonexistent/socket", "nonexistent")
|
|
assert result is None, "inconclusive probe should return None"
|