code: def test_insert_multi_words(self):
      texts = ["The quick brown fox jumps over the lazy dog"]
      aug = RandomCharAug(action="insert", min_char=1)
      for text in texts:
          augmented_cnt = 0
          augmented_data = aug.augment(text)
          augmented_text = augmented_data[0]
  
          tokens = aug.tokenizer(text)
          augmented_tokens = aug.tokenizer(augmented_text)
  
          for token, augmented_token in zip(tokens, augmented_tokens):
              if token != augmented_token:
                  augmented_cnt += 1
  
          self.assertLess(augmented_cnt, len(tokens))
          self.assertNotEqual(text, augmented_text)
          self.assertLess(len(text), len(augmented_text))
  
      self.assertTrue(len(texts) > 0)
  
file_path: nlpaug/test/augmenter/char/test_random_char.py
imports: import unittest
  from nlpaug.augmenter.char.random import RandomCharAug
label_desc: Use image node_id 2 for calling the TestRandomCharReplaceAug obj's underlying member method code with example usage: obj.test_insert_multi_words() without return types