code: def test_resources_none(self) -> None:
      r = bes.server_document(
          url="http://localhost:8081/foo/bar/sliders", resources=None
      )
      assert "resources=none" in r
  
imports: from __future__ import annotations
  import pytest
  import bs4
  import bokeh.embed.server
label_desc: Use image node_id 3 for calling the TestServerDocument obj's underlying member method code with example usage: obj.test_resources_none() without return types