120 lines
5.5 KiB
Python
120 lines
5.5 KiB
Python
# #region TestAlembicMigrations [C:3] [TYPE Module] [SEMANTICS tests, alembic, migration, schema, idempotent]
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# @BRIEF Verifies Alembic migration chain: fresh upgrade and legacy upgrade.
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# @RELATION BINDS_TO -> [ed310b33f02c]
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# @INVARIANT Running `alembic upgrade head` twice is idempotent (no-op on second run) on PostgreSQL.
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# @INVARIANT Legacy database with existing tables can be upgraded via `alembic upgrade head`.
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# @PRE Alembic is installed, migration files exist in alembic/versions/.
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# @POST Schema matches expected state after upgrade.
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# @TEST_INVARIANT: alembic_fresh_upgrade -> VERIFIED_BY: [test_fresh_upgrade_creates_tables]
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# @TEST_INVARIANT: alembic_upgrade_legacy -> VERIFIED_BY: [test_legacy_database_upgrade]
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# @REJECTED Full migration chain idempotency on SQLite — initial migration uses
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# op.create_index() which conflicts with SQLite auto-created indexes
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# for UNIQUE constraints. Migrations are designed for PostgreSQL.
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# @REJECTED Legacy stamp + raw SQL rejected — entrypoint now runs `alembic upgrade head`
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# for legacy databases, ensuring all missing tables/columns are created.
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import os
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import sys
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from pathlib import Path
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import pytest
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# Ensure backend/src is importable for model metadata
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sys.path.insert(0, str(Path(__file__).parent.parent / "src"))
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# Alembic migrations use PostgreSQL-specific features (CREATE INDEX may conflict
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# with SQLite auto-indexes for UNIQUE constraints). Skip full-chain tests on SQLite.
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_DB_BACKEND = os.environ.get("DATABASE_URL", "sqlite://").split(":")[0]
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_REQUIRES_PG = pytest.mark.skipif(
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_DB_BACKEND != "postgresql",
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reason="Alembic migrations are PostgreSQL-specific; use postgresql:// DATABASE_URL to test",
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)
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# #region test_fresh_upgrade_creates_tables [C:3] [TYPE Function]
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# @BRIEF Run alembic upgrade head on a fresh PostgreSQL DB and verify key tables exist.
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# @POST All expected tables exist after upgrade.
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# @TEST_INVARIANT: alembic_fresh_upgrade -> VERIFIED_BY: [test_fresh_upgrade_creates_tables]
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@_REQUIRES_PG
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def test_fresh_upgrade_creates_tables() -> None:
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"""Fresh Alembic upgrade creates all expected tables (PostgreSQL only)."""
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from sqlalchemy import create_engine, inspect
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from sqlalchemy import text as sa_text
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backend_dir = Path(__file__).parent.parent
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_run_alembic_upgrade()
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engine = create_engine(os.environ["DATABASE_URL"])
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inspector = inspect(engine)
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tables = set(inspector.get_table_names())
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expected_tables = {
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"environments",
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"translation_jobs",
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"users",
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"roles",
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"permissions",
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"task_records",
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"alembic_version",
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}
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missing = expected_tables - tables
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assert not missing, f"Missing tables after Alembic upgrade: {missing}"
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with engine.connect() as conn:
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result = conn.execute(sa_text("SELECT version_num FROM alembic_version"))
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version = result.scalar_one()
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assert version is not None and len(version) > 0
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roles_cols = {c["name"] for c in inspector.get_columns("roles")}
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assert "is_admin" in roles_cols, "roles.is_admin column missing after Alembic upgrade"
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engine.dispose()
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# #endregion test_fresh_upgrade_creates_tables
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# #region test_legacy_database_upgrade [C:2] [TYPE Function]
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# @BRIEF Simulate legacy DB (tables exist, no alembic_version), verify upgrade head works.
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# @POST alembic_version created, all migration columns present after upgrade.
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# @TEST_INVARIANT: alembic_upgrade_legacy -> VERIFIED_BY: [test_legacy_database_upgrade]
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@_REQUIRES_PG
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def test_legacy_database_upgrade() -> None:
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"""Alembic upgrade head works on a database that already has tables but no alembic_version."""
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from sqlalchemy import create_engine, inspect
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from sqlalchemy import text as sa_text
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from src.models.mapping import Base
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from src.models import auth as _auth # noqa: F401
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from src.models import task as _task # noqa: F401
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engine = create_engine(os.environ["DATABASE_URL"])
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# Drop alembic_version if exists to simulate legacy state
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with engine.begin() as conn:
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conn.execute(sa_text("DROP TABLE IF EXISTS alembic_version CASCADE"))
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engine.dispose()
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# Tables already exist from previous runs (create_all) — this is the legacy state.
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# Run upgrade head (new entrypoint behavior for legacy DB)
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_run_alembic_upgrade()
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# Verify
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engine = create_engine(os.environ["DATABASE_URL"])
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inspector = inspect(engine)
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tables = set(inspector.get_table_names())
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assert "alembic_version" in tables, "alembic_version table not created by upgrade"
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roles_cols = {c["name"] for c in inspector.get_columns("roles")}
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assert "is_admin" in roles_cols, "roles.is_admin column missing after legacy upgrade"
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# Verify version_num matches head
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result = engine.connect().execute(sa_text("SELECT version_num FROM alembic_version"))
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version = result.scalar_one()
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assert version is not None and len(version) > 0
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engine.dispose()
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# #endregion test_legacy_database_upgrade
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# #region _run_alembic_upgrade [C:1] [TYPE Function]
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def _run_alembic_upgrade() -> None:
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"""Run alembic upgrade head programmatically."""
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from alembic.config import Config as AlembicConfig
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from alembic import command as alembic_command
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backend_dir = Path(__file__).parent.parent
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alembic_cfg = AlembicConfig(str(backend_dir / "alembic.ini"))
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alembic_cfg.set_main_option("script_location", str(backend_dir / "alembic"))
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alembic_command.upgrade(alembic_cfg, "head")
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# #endregion _run_alembic_upgrade
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# #endregion TestAlembicMigrations
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