class_docstr: Test the config system.
class_docstr_tok: ["Test","the","config","system","."]
code: def test_get_options_for_section(self):
      config._set_option("theme.primaryColor", "000000", "test")
      config._set_option("theme.font", "serif", "test")
  
      expected = {
          "base": None,
          "primaryColor": "000000",
          "secondaryBackgroundColor": None,
          "backgroundColor": None,
          "textColor": None,
          "font": "serif",
      }
      self.assertEqual(
          config.get_options_for_section("theme"), expected
      )
  
imports: import copy
  import os
  import textwrap
  import unittest
  from unittest.mock import MagicMock, mock_open, patch
  import pytest
  from parameterized import parameterized
  from streamlit import config, env_util
  from streamlit.config_option import ConfigOption
  from streamlit.errors import StreamlitAPIException
label_desc: Use image node_id 31 for calling the ConfigTest obj's underlying member method code with example usage: obj.test_get_options_for_section() without return types