retoorandClaude Sonnet 5
9dbd1fe667
- Plexer: always-active terminal multiplexing. NativePlexerController/ TmuxPlexerController share one interface, chosen by which env var is already set (TAI_PLEXER_SOCKET vs TMUX_PANE); NativePlexerBackend is the pty.fork()-based wrapper (raw mode, SIGWINCH resize forwarding, a Unix-socket control protocol, continuous session logging, a Ctrl+A prefix key distinct from tmux's own Ctrl+B). Auto-wraps new interactive shells via a .bashrc hook mirroring the existing command-not-found install pattern, gated on $TMUX/$TAI_PLEXER_ACTIVE/ a $HOME/.tai-no-plexer bypass. New plexer_send/read/type/status tools, env-gated on a detected controller. - tests/container.py + docker-compose.yml + tests/docker/Dockerfile: a disposable podman/docker image for the tests that must never touch a real machine (installing the plexer hook into a real ~/.bashrc, a live tmux session). Required suite (test_seal.py, test_tai.py, tests/plexer.py, tests/bashrc.py) gates the result; tests/rag.py runs as best-effort since its real-LLM dependency can't be satisfied inside a disposable container with no nested engine. - tests/bashrc.py: real end-to-end hook install + bash -i auto-wrap, anti-recursion, tmux-active skip, non-interactive skip, a live TmuxPlexerController test, and an install/uninstall round-trip. - tests/plexer.py: NativePlexerBackend under a real pty, plus a dedicated robustness pass (file permissions, >64KB payload framing, a malformed control request, a genuine self-deadlock fix in the write-to-child path). - tai_test.py: the shared async process-driving framework (pipe/pty transport, group-wide kill-and-reap, a StdinBridge for --interactive) both test files build on. - ChatClient last-resort backend: when there's no local opencode CLI but the sandbox box is already running, install opencode into it (official Node tarball, not apt -- apt's nodejs/npm pull in webpack/babel/jest as transitive deps) and route through it instead of giving up. Only reachable after the first retry round already failed everything else; never creates the box itself. TmuxPlexerController.status() fixed to use `list-panes` instead of `display-message -p`, which silently fell back to the default pane instead of erroring against a dead target. - Fix 4 pre-existing test_tai.py bugs surfaced by running it in a clean environment for the first time: two stale mock signatures (subprocess.run's stdout= kwarg, Chat.complete's deadline= kwarg), one $TMUX-dependent catalog assertion, one tty-dependent color assertion. - research/: a sourced research archive (Source Dossier/Citation Card/Conclusion tiers) backing the above design decisions, with its own audit.py consistency checker. - .gitignore: fix a blanket *.md rule that was about to silently drop the entire research/ archive from version control; add __pycache__/ and the one-off debug transcript this session started from. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
50 lines
3.3 KiB
Markdown
50 lines
3.3 KiB
Markdown
# CERN Gaudi — SubprocessBaseTest / GaudiExeTest
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## Metadata
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| Field | Value |
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| Institute | Molodetz Institute — Research & Retrieval Division |
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| Subject | async-pty-process-testing |
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| Document type | Source Dossier |
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| Tier | 1 |
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| Source title | Gaudi merge request !1605 (SubprocessBaseTest / GaudiExeTest), and companion doxygen source page |
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| Source URL | https://gitlab.cern.ch/gaudi/Gaudi/-/merge_requests/1605 |
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| Source publisher / author | CERN (Gaudi physics-software framework project) |
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| Source type | repository (merge request + generated source documentation) |
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| Source date (published) | Unknown — not stated |
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| Date researched | 2026-10-09 |
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| Researched by | tai (agent), model: Claude Sonnet 5, on behalf of retoor |
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| Research method | web search synthesis |
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| Confidence | High |
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| Status | Active |
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## Summary
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CERN's Gaudi framework (used across large physics experiments) includes a `SubprocessBaseTest` base class and a `GaudiExeTest` subclass for running and verifying subprocess-based tests. Test authors configure tests by setting class attributes (command, environment, timeout, expected return code) rather than writing imperative test logic, with an overridable `preprocessor` hook for customizing output handling. This companion source (`gaudi.web.cern.ch/doxygen/.../_base_test_8py_source.html`) is the generated source documentation for the same base class.
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## Key findings
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- `SubprocessBaseTest` is explicitly documented as providing "the setup and utility methods for ensuring tests run in a consistent environment" — the test author's job is reduced to declaring configuration, not reimplementing process management per test.
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- Configuration happens through class attributes: command, environment, timeout, and expected return code are all named, documented fields on the test class.
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- Output handling is customizable via an overridable `preprocessor` attribute on `GaudiExeTest`, letting a subclass change how reference-output comparison works without touching the runner itself.
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## Pros / strengths
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- A mature, battle-tested framework used in large, real scientific-computing codebases — strong evidence this "declarative base class + override hooks" shape scales to many tests written by many different authors over time, which is exactly the goal stated for `tai_test.py` ("a structure that scales and will be allowed [to be] followed").
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## Cons / limitations / caveats
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- Domain-specific to physics-software testing (comparing program output against reference files); not every detail (e.g. reference-file resolution relative to the test's own location) was adopted, since `tai_test.py`'s tests assert on vault state and search output rather than diffing against golden files.
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- Reviewed via its merge request description and generated source documentation, not a full read of the implementation's actual Python source.
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## Relevance to tai
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The direct architectural model for `tai_test.py.TestCase`: class-level attributes (`name`, `timeout`, `mode`) instead of constructor boilerplate, and override hooks (`setup`/`run`/`verify`/`teardown`) instead of one monolithic test method — mirroring Gaudi's class-attribute configuration plus its overridable `preprocessor` hook.
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## Changelog
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| Date | Change |
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| 2026-10-09 | Initial dossier created. |
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