peter
4b6bc54aa8
The suite was pure-logic only (R2 S2b deferred the DB lane). Add an opt-in `db` fixture (tests/conftest.py) that hands a test a real session against an ephemeral Postgres; schema is built with `alembic upgrade head` (the real prod schema needs the unaccent extension + unaccent_simple TS config that create_all can't provide, and this also proves the migration chain applies). Each test starts from a TRUNCATEd clean DB so tests that COMMIT — the whole point, for R6 S2's transaction work — don't leak. backend/docker-compose.test.yml wires an ephemeral tmpfs pg + the test image. When no Postgres is reachable (a plain `docker run`), the DB tests SKIP and the pure-logic lane is unchanged: 172 passed, 2 skipped. With the DB: 174 passed. test_db_lane.py smoke-proves commit round-trip + TRUNCATE isolation. The gate wiring (siftlode.sh) lands in the ops repo.
66 lines
2.6 KiB
Python
66 lines
2.6 KiB
Python
"""Pytest fixtures for the DB-backed integration lane (R6 S3b).
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The bulk of the suite is pure-logic and needs no database. This adds an OPT-IN `db` fixture
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that hands a test a real session against a throwaway Postgres (the app's own engine, bound to
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the test `DATABASE_URL`). When no database is reachable — the default `siftlode check` still
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runs the pure-logic tests with no Postgres — any test that asks for `db` is SKIPPED, so the
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pure-logic lane is unaffected.
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Schema comes from `alembic upgrade head` — not `create_all` — because the real schema depends on
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things only migrations set up (the `unaccent` extension + the `public.unaccent_simple` text-search
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config the videos.search_vector generated column needs). Building it via migrations also validates
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that the migration chain applies cleanly. Each test then gets a clean database via TRUNCATE so
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tests that COMMIT (the whole point of this lane — transaction-ownership behaviour) don't leak.
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"""
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import pytest
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from alembic import command
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from alembic.config import Config
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from sqlalchemy import text
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import app.models # noqa: F401 — register every model on Base.metadata
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from app.db import Base, SessionLocal, engine
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def _db_reachable() -> bool:
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try:
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with engine.connect() as conn:
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conn.execute(text("SELECT 1"))
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return True
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except Exception:
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return False
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_DB_REACHABLE = _db_reachable()
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@pytest.fixture(scope="session")
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def _schema():
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if not _DB_REACHABLE:
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pytest.skip("no test database (set DATABASE_URL to a reachable Postgres)")
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# Build the real prod schema via migrations (alembic env.py reads settings.database_url, i.e.
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# the test DATABASE_URL). Idempotent — a re-run against an already-migrated DB is a no-op.
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command.upgrade(Config("alembic.ini"), "head")
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yield
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def _truncate_all():
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# RESTART IDENTITY so serial PKs are deterministic per test; CASCADE handles FKs. Truncating
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# BEFORE each test (not after) means every test — including the first, which would otherwise see
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# migration-seeded rows — starts from the same empty slate and seeds only what it needs.
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tables = ", ".join(t.name for t in Base.metadata.sorted_tables)
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with engine.begin() as conn:
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conn.execute(text(f"TRUNCATE {tables} RESTART IDENTITY CASCADE"))
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@pytest.fixture
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def db(_schema):
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"""A real session against the test Postgres, on a clean (empty) database. The code under test
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may commit freely."""
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_truncate_all()
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session = SessionLocal()
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try:
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yield session
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finally:
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session.rollback()
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session.close()
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