class_docstr: Test the config system.
class_docstr_tok: ["Test","the","config","system","."]
code: def test_get_option(self):
      config._set_option("browser.serverAddress", "some.bucket", "test")
      self.assertEqual(
          "some.bucket", config.get_option("browser.serverAddress")
      )
  
      with pytest.raises(RuntimeError) as e:
          config.get_option("doesnt.exist")
      self.assertEqual(
          str(e.value), 'Config key "doesnt.exist" not defined.'
      )
  
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 30 for calling the ConfigTest obj's underlying member method code with example usage: obj.test_get_option() without return types