[jihtsan]

Keep override_config-decorated coroutine functions recognizable as async tests and retain overrides until the awaited function finishes. Run synchronous override setup/cleanup in a thread-sensitive worker so the database backend remains usable; always restore values when the test raises. Synchronous functions and class decoration keep the existing path.

Closes #522.

Validation on CPython 3.13.12 / Django 5.2.18: new regressions fail on the original wrapper, then cover coroutine identity, values across suspension, return values, exception restoration, direct async test methods and a real SQLite backend. Full unittest run passes (169 tests, 1 intentional skip); full pytest passes (176 passed, 1 skipped, 6 existing sync-access warnings). CI-pinned Ruff 0.5.0 lint/format checks pass on both changed Python files; migration check reports no changes. The full unittest suite also passes on CPython 3.11.16 / Django 4.2.30 (169 tests, 1 intentional skip). Other matrix combinations and hosted CI were not verified. Redis tests use the repository mock; no real Redis server was used. Documentation text was checked but not built locally.

[Copilot]

🟡 Changes recommended

Cancellation during setup can skip cleanup while the worker still applies overrides, leaking configuration into subsequent tests.

1 open issue

• Restore overrides when worker setup is cancelled · New

What changed in this PR

Adds async support to override_config, addressing #522 by preserving coroutine detection and keeping overrides active until the awaited test finishes.

Changes:

• Adds an async wrapper with thread-sensitive setup and cleanup, while preserving synchronous and class decoration.
• Adds regressions for coroutine detection, override lifetime, return values, exception restoration, and database-backed usage.
• Documents async test support.

File	Description
tests/​test_test_overrides.py	Adds async decorator regressions, including database backend coverage.
docs/​testing.rst	Documents override lifetime for async tests.
constance/​test/​unittest.py	Adds coroutine-aware wrapping with worker-thread setup and cleanup.

_{Review effort: Balanced}

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
constance/test/unittest.py	89.28% <100.00%> (ø)

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