async def test_load_empty(service_type):
  """Tests loading an artifact when none exists."""
  artifact_service = get_artifact_service(service_type)
  assert not await artifact_service.load_artifact(
      app_name="test_app",
      user_id="test_user",
      session_id="session_id",
      filename="filename",
  )
Tests loading an artifact when none exists.
tests/unittests/artifacts/test_artifact_service.py