class_docstr: Test st.help.
class_docstr_tok: ["Test","st.help","."]
docstr: When st.help is called with None as an argument, don't show Streamlit docs.
docstr_tok: ["When","st.help","is","called","with","None","as","an","argument",",","do","n't","show","Streamlit","docs","."]
code: def test_none_arg(self):
      """When st.help is called with None as an argument, don't show Streamlit docs."""
  
      with patch_varname_getter():
          st.help(None)
  
      ds = self.get_delta_from_queue().new_element.doc_string
      self.assertEqual("", ds.name)
      self.assertEqual("None", ds.value)
      self.assertEqual("NoneType", ds.type)
      self.assertEqual("", ds.doc_string)
  
imports: import inspect
  import sys
  import unittest
  from unittest.mock import patch
  import numpy
  import pytest
  import streamlit
  from streamlit.elements.doc_string import _get_variable_name_from_code_str
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 2 for calling the StHelpTest obj's underlying member method code with example usage: obj.test_none_arg() without return types