code: def test_should_set_permanent_session_timeout(self):
      app = application.cached_app(testing=True)
      assert app.config["PERMANENT_SESSION_LIFETIME"] == timedelta(
          minutes=3600
      )
  
imports: from __future__ import annotations
  import hashlib
  import re
  import runpy
  import sys
  from datetime import timedelta
  from unittest import mock
  import pytest
  from werkzeug.routing import Rule
  from werkzeug.test import create_environ
  from werkzeug.wrappers import Response
  from airflow.exceptions import AirflowConfigException
  from airflow.www import app
  from tests.test_utils.config import conf_vars
  from tests.test_utils.decorators import dont_initialize_flask_app_submodules
label_desc: Use image node_id 6 for calling the TestApp obj's underlying member method code with example usage: obj.test_should_set_permanent_session_timeout() without return types