test-lanes

name	test-lanes
description	Use when writing or modifying tests — choose the unit or integration lane, the right markers and mock fixtures, respect the hermetic autouse guards, and hit 80% patch coverage.

Test lanes, fixtures, and coverage

1. Pick the lane — there are TWO: unit (tests/unit/) mocks ALL external I/O; integration (tests/integration/) uses real MySQL + Redis service containers. Mark accordingly (@pytest.mark.unit/integration, plus slow / requires_openai / requires_database / requires_selenium) — --strict-markers is on, and e2e is no longer a registered marker (#1215).
2. Mock fixtures: mock_openai_client (patches cqc_lem.utilities.ai.client.OpenAI), mock_database_connection (patches mysql.connector.connect), mock_selenium_driver.
3. Hermetic autouse guards already pin the environment — don't fight them, opt back in explicitly in the tests that need the real behaviour: _no_real_llm_calls / _no_real_redis / _feature_flags_env_only (unit conftest), _humanize_disabled_by_default (HUMANIZE_ENABLED=off), _human_pacing_disabled_by_default, _db_pool_disabled_by_default (root conftest — the pool bypasses the mocked connect).
4. The integration lane's guard is harder: _no_live_llm_calls (integration conftest, #1188) FAILS the test on any unmocked LLM request, with a BaseException no except Exception fallback can swallow. Mock the client the module under test imported, or the helper wrapping it — a real call there was 311s of a 354s lane while the tests still passed.
5. Run: poetry run pytest tests/unit -v --tb=short (fast lane); coverage: poetry run pytest --cov=src/cqc_lem --cov-report=xml. CI enforces ≥80% patch coverage via Codecov on every PR.
6. Test the pure half of Selenium code (parsing, scoring, message shaping) in unit tests. DOM interaction has no CI lane — the read-only live probe grades it against the real page (see the linkedin-live-validation skill). #1215 deleted the e2e lane rather than keep claiming one: it was 17 tests, 6 of them mocks already duplicated in tests/unit/, 11 permanently skipped, under continue-on-error.

Authoritative: tests/README.md (markers, commands, xdist notes), CONTRIBUTING.md (TDD checklists).