code: def test_all(self):
      self._train()
  
      self._empty_input_for_insert()
      self._oov()
      self._insert()
      self._substitute()
      self._substitute_stopwords()
      self._skip_punctuation()
  
      self.housekeep()
  
file_path: nlpaug/test/augmenter/word/test_tfidf.py
imports: import unittest
  import os
  import re
  from dotenv import load_dotenv
  import sklearn.datasets
  import nlpaug.augmenter.word
  import nlpaug.model.word_stats
  from nlpaug.util import Action
label_desc: Use image node_id 2 for calling the TestTfIdf obj's underlying member method code with example usage: obj.test_all() without return types