Implement generic approval runtime

tests/test_migrations.py

@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+from pathlib import Path
+import tempfile
+import unittest
+
+from alembic.runtime.migration import MigrationContext
+from sqlalchemy import create_engine, inspect
+
+from govoplan_approvals.backend.manifest import get_manifest
+from govoplan_core.db.migrations import migrate_database
+
+
+class ApprovalsMigrationTests(unittest.TestCase):
+    def test_fresh_migration_creates_approval_runtime_tables(self) -> None:
+        with tempfile.TemporaryDirectory(prefix="govoplan-approvals-") as directory:
+            url = f"sqlite:///{Path(directory) / 'approvals.db'}"
+            migrate_database(
+                database_url=url,
+                enabled_modules=("approvals",),
+                manifest_factories=(get_manifest,),
+            )
+            engine = create_engine(url)
+            try:
+                tables = set(inspect(engine).get_table_names())
+                self.assertTrue(
+                    {
+                        "approval_template_revisions",
+                        "approval_request_revisions",
+                        "approval_decision_records",
+                        "approval_lifecycle_events",
+                        "approval_replays",
+                    }.issubset(tables)
+                )
+                with engine.connect() as connection:
+                    self.assertIn(
+                        "8b9c0d1e2f3a",
+                        set(MigrationContext.configure(connection).get_current_heads()),
+                    )
+            finally:
+                engine.dispose()
+
+
+if __name__ == "__main__":
+    unittest.main()