75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
"""Alembic migration smoke test.
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We do not boot a real Postgres in CI; instead we point Alembic at an in-process
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SQLite database and verify:
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- ``alembic upgrade head`` succeeds offline (SQL generation) using the real
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migration files, exercising every column type and constraint declaration;
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- ``downgrade base`` rewinds without errors.
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This catches typos and broken migration ordering early without requiring the
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full backing-service compose stack to be online.
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"""
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from __future__ import annotations
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import sys
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from pathlib import Path
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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 alembic.script import ScriptDirectory
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ROOT = Path(__file__).resolve().parents[1]
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sys.path.insert(0, str(ROOT))
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@pytest.fixture
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def alembic_cfg(tmp_path, monkeypatch):
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"""Configure Alembic against an isolated SQLite file."""
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db_file = tmp_path / "legacyhub.db"
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monkeypatch.setenv("POSTGRES_HOST", "127.0.0.1")
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monkeypatch.setenv("POSTGRES_PORT", "5432")
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cfg = Config(str(ROOT / "alembic.ini"))
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cfg.set_main_option("script_location", str(ROOT / "app" / "db" / "migrations"))
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cfg.set_main_option("sqlalchemy.url", f"sqlite:///{db_file}")
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return cfg
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def test_migration_offline_emits_sql(alembic_cfg, tmp_path):
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"""Offline mode generates SQL for every table; verify ``documents`` appears
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and the TeamHUB AssetManifest ingest job table is part of the linear head.
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SQLite has no JSONB but Alembic's offline mode happily emits the raw DDL for
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inspection.
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"""
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out_file = tmp_path / "upgrade.sql"
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# ``--sql`` mode bypasses dialect-specific runtime, perfect for a fast check.
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with out_file.open("w", encoding="utf-8") as f:
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old_stdout = sys.stdout
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sys.stdout = f
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try:
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command.upgrade(alembic_cfg, "head", sql=True)
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finally:
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sys.stdout = old_stdout
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sql = out_file.read_text(encoding="utf-8")
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assert "CREATE TABLE documents" in sql
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assert "CREATE TABLE chunks" in sql
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assert "CREATE TABLE processing_events" in sql
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assert "CREATE TABLE asset_ingest_jobs" in sql
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# Constraint sanity
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assert "uq_chunks_doc_idx" in sql
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assert "uq_pages_doc_page" in sql
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assert "uq_asset_ingest_identity" in sql
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def test_revision_history_is_linear(alembic_cfg):
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"""The project keeps a single linear migration head."""
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script = ScriptDirectory.from_config(alembic_cfg)
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heads = script.get_heads()
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assert len(heads) == 1, f"expected one head, got: {heads}"
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assert heads == ["0002_asset_ingest_jobs"]
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revisions = [rev.revision for rev in script.walk_revisions()]
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assert revisions == ["0002_asset_ingest_jobs", "0001_initial"]
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