refactor(assets): modular architecture + async two-phase scanner & background seeder (#12621)

tests-unit/assets_test/services/conftest.py

@@ -0,0 +1,54 @@
+import tempfile
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+from sqlalchemy import create_engine
+from sqlalchemy.orm import Session
+
+from app.assets.database.models import Base
+
+
+@pytest.fixture(autouse=True)
+def autoclean_unit_test_assets():
+    """Override parent autouse fixture - service unit tests don't need server cleanup."""
+    yield
+
+
+@pytest.fixture
+def db_engine():
+    """In-memory SQLite engine for fast unit tests."""
+    engine = create_engine("sqlite:///:memory:")
+    Base.metadata.create_all(engine)
+    return engine
+
+
+@pytest.fixture
+def session(db_engine):
+    """Session fixture for tests that need direct DB access."""
+    with Session(db_engine) as sess:
+        yield sess
+
+
+@pytest.fixture
+def mock_create_session(db_engine):
+    """Patch create_session to use our in-memory database."""
+    from contextlib import contextmanager
+    from sqlalchemy.orm import Session as SASession
+
+    @contextmanager
+    def _create_session():
+        with SASession(db_engine) as sess:
+            yield sess
+
+    with patch("app.assets.services.ingest.create_session", _create_session), \
+         patch("app.assets.services.asset_management.create_session", _create_session), \
+         patch("app.assets.services.tagging.create_session", _create_session):
+        yield _create_session
+
+
+@pytest.fixture
+def temp_dir():
+    """Temporary directory for file operations."""
+    with tempfile.TemporaryDirectory() as tmpdir:
+        yield Path(tmpdir)