code: def test_InsertWhitespaceChars(self) -> None:
      aug_whitespace_text = txtaugs.InsertWhitespaceChars(
          "all", 1.0, False
      )(self.texts, metadata=self.metadata)
  
      # Separator inserted between every character (including spaces/punctuation).
      self.assertEqual(
          aug_whitespace_text,
          [
              "T h e   q u i c k   b r o w n   ' f o x '   c o u l d n ' t   "
              "j u m p   o v e r   t h e   g r e e n ,   g r a s s y   h i l l ."
          ],
      )
      self.assertTrue(
          are_equal_metadata(
              self.metadata,
              self.expected_metadata["insert_whitespace_chars"],
          ),
      )
  
imports: import json
  import os
  import random
  import unittest
  from typing import Any, Dict, List
  from augly import text
  from augly.utils import TEXT_METADATA_PATH
label_desc: Use image node_id 11 for calling the TransformsTextUnitTest obj's underlying member method code with example usage: obj.test_InsertWhitespaceChars() without return types