code: def test_xsrf_cookies() -> None:
      bt = bst.BokehTornado(applications={})
      assert not bt.settings["xsrf_cookies"]
  
      bt = bst.BokehTornado(applications={}, xsrf_cookies=True)
      assert bt.settings["xsrf_cookies"]
  
imports: from __future__ import annotations
  import pytest
  import json
  import logging
  from _util_server import http_get, url
  from tornado.web import StaticFileHandler
  from bokeh.application import Application
  from bokeh.client import pull_session
  from bokeh.core.types import ID
  from bokeh.server.auth_provider import NullAuth
  from bokeh.server.views.static_handler import StaticHandler
  from bokeh.server.views.ws import WSHandler
  from tests.support.plugins.managed_server_loop import MSL
  from tests.support.util.env import envset
  import bokeh.server.tornado
label_desc: Use image node_id 6 for calling a global function with example usage: test_xsrf_cookies() without return types