code: def test_session_factory_empty():
      """Get a DummySession for no path"""
      sesh = Session.from_path("")
      assert isinstance(sesh, DummySession)
  
imports: from unittest import mock
  import pytest
  from fiona.session import DummySession, AWSSession, Session, OSSSession, GSSession, SwiftSession, AzureSession
label_desc: Use image node_id 10 for calling a global function with example usage: test_session_factory_empty() without return types