code: def test_preprocess_types(self):
      docstring = """\
  Do as you please
  
  Yield:
     str:Extended
  """
      actual = str(GoogleDocstring(docstring))
      expected = """\
  Do as you please
  
  :Yields: *str* -- Extended
  """
      assert expected == actual
  
      config = Config(napoleon_preprocess_types=True)
      actual = str(GoogleDocstring(docstring, config))
      expected = """\
  Do as you please
  
  :Yields: :py:class:`str` -- Extended
  """
      assert expected == actual
  
imports: import re
  from collections import namedtuple
  from inspect import cleandoc
  from textwrap import dedent
  from unittest import mock
  import pytest
  from sphinx.ext.napoleon import Config
  from sphinx.ext.napoleon.docstring import GoogleDocstring, NumpyDocstring, _convert_numpy_type_spec, _recombine_set_tokens, _token_type, _tokenize_type_spec
  from tests.test_extensions.ext_napoleon_pep526_data_google import PEP526GoogleClass
  from tests.test_extensions.ext_napoleon_pep526_data_numpy import PEP526NumpyClass
label_desc: Use image node_id 17 for calling the TestGoogleDocstring obj's underlying member method code with example usage: obj.test_preprocess_types() without return types