test(gateway): fix google_chat env-config tests under py3.11 + xdist (8/N)

[Bartok9]

Summary

Follow-up to the green-up series (#6–#12). The 6
tests/gateway/test_google_chat.py::TestEnvConfigLoading tests still fail
under the CI matrix (Python 3.11, pytest -n auto) after #12.

#12 correctly fixed a Python 3.12+ enum attribute-access path
(Platform.GOOGLE_CHAT raising AttributeError). But under Python 3.11 the
failure has a different root cause, so those 6 tests remained red on CI.

Root cause (3.11 + xdist)

The plugin loader imports the bundled adapter a second time under a
synthetic namespace hermes_plugins.google_chat_platform.adapter — a distinct
module object from the plugins.platforms.google_chat.adapter copy the test
module shims to GOOGLE_CHAT_AVAILABLE=True at import.

The synthetic copy reflects whether the real google.* libs are importable
(False in CI). Under -n auto, a sibling test in the same worker can
trigger plugin discovery — importing that synthetic copy with the flag False
— before this module's google mocks are installed. The stale copy is cached,
so discover_plugins() won't re-exec it. Its check_fn
(_check_for_registry, gated on GOOGLE_CHAT_AVAILABLE) then returns False,
load_gateway_config() silently skips the platform, and
cfg.platforms[Platform.GOOGLE_CHAT] raises KeyError.

I confirmed this by reproducing the CI matrix locally (uv-built Python
3.11.15 venv, .[all,dev], -n auto) and instrumenting the silent enable
pass: check_fn=False, avail=True on the shimmed copy, but the check_fn's
__module__ was hermes_plugins.google_chat_platform.adapter with its own
GOOGLE_CHAT_AVAILABLE=False.

Fix

Add an autouse fixture that forces GOOGLE_CHAT_AVAILABLE=True on every
loaded google_chat adapter copy before each test, making enablement
independent of which copy discovery imported and of cross-module import
ordering. No production code changes.

Test plan

• Reproduced the 6 failures on main under Python 3.11 -n auto (CI config).
• With the fix, tests/gateway/test_google_chat.py passes in isolation (153 passed).
• Full-suite -n auto runs (×2): 0 google_chat failures (deterministic).

Made with Cursor

---

Note

Low Risk
Test-only change; no runtime gateway or adapter behavior is modified.

Overview
Adds an autouse pytest fixture in tests/gateway/test_google_chat.py that sets GOOGLE_CHAT_AVAILABLE = True on every loaded Google Chat adapter module in sys.modules before each test.

This fixes flaky TestEnvConfigLoading failures under Python 3.11 and pytest -n auto: plugin discovery can cache a second adapter import (hermes_plugins.google_chat_platform.adapter) with the flag still False in CI, so load_gateway_config() skips Google Chat and tests hit KeyError on cfg.platforms[Platform.GOOGLE_CHAT]. No production code changes.

^{Reviewed by Cursor Bugbot for commit 01df913. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

🔎 Lint report: fix/google-chat-1m-xdist-availability vs origin/main

ruff

Total: 0 on HEAD, 0 on base (➖ 0)

🆕 New issues: none

✅ Fixed issues: none

Unchanged: 0 pre-existing issues carried over.

ty (type checker)

Total: 7750 on HEAD, 7749 on base (🆕 +1)

🆕 New issues (4):

Rule	Count
invalid-argument-type	3
unresolved-attribute	1

First entries

run_agent.py:6649: [invalid-argument-type] invalid-argument-type: Argument to function `build_anthropic_client` is incorrect: Expected `str`, found `str | dict[Unknown | str, Unknown | str | dict[str, str]] | Any | ... omitted 3 union elements`
run_agent.py:12542: [invalid-argument-type] invalid-argument-type: Argument to function `len` is incorrect: Expected `Sized`, found `(str & ~AlwaysFalsy) | (dict[Unknown | str, Unknown | str | dict[str, str]] & ~AlwaysFalsy) | (Any & ~AlwaysFalsy) | ... omitted 3 union elements`
tests/gateway/test_google_chat.py:172: [unresolved-attribute] unresolved-attribute: Unresolved attribute `GOOGLE_CHAT_AVAILABLE` on type `ModuleType`
run_agent.py:12539: [invalid-argument-type] invalid-argument-type: Argument to function `_is_oauth_token` is incorrect: Expected `str`, found `str | dict[Unknown | str, Unknown | str | dict[str, str]] | Any | ... omitted 3 union elements`

✅ Fixed issues (3):

Rule	Count
invalid-argument-type	3

First entries

run_agent.py:12542: [invalid-argument-type] invalid-argument-type: Argument to function `len` is incorrect: Expected `Sized`, found `(str & ~AlwaysFalsy) | (dict[Unknown, Unknown] & ~AlwaysFalsy) | (Any & ~AlwaysFalsy) | ... omitted 3 union elements`
run_agent.py:6649: [invalid-argument-type] invalid-argument-type: Argument to function `build_anthropic_client` is incorrect: Expected `str`, found `str | dict[Unknown, Unknown] | Any | ... omitted 3 union elements`
run_agent.py:12539: [invalid-argument-type] invalid-argument-type: Argument to function `_is_oauth_token` is incorrect: Expected `str`, found `str | dict[Unknown, Unknown] | Any | ... omitted 3 union elements`

Unchanged: 4075 pre-existing issues carried over.

Diagnostics are surfaced as warnings — this check never fails the build.