code: def test_single_action(self):
      texts = [
          "The quick brown fox jumps over the lazy dog",
          "Zology raku123456 fasdasd asd4123414 1234584 s@#",
      ]
  
      flow = naf.Sequential(
          [nac.RandomCharAug(action=Action.INSERT, min_char=1)]
      )
  
      for text in texts:
          augmented_text = flow.augment(text)
  
          self.assertNotEqual(text, augmented_text)
          self.assertLess(0, len(text))
  
      self.assertLess(0, len(texts))
  
file_path: nlpaug/test/flow/test_sequential.py
imports: import unittest
  import os
  import numpy
  from dotenv import load_dotenv
  import nlpaug.augmenter.char
  import nlpaug.augmenter.word
  import nlpaug.augmenter.spectrogram
  import nlpaug.augmenter.audio
  import nlpaug.flow
  from nlpaug.util import Action, AudioLoader
label_desc: Use image node_id 3 for calling the TestSequential obj's underlying member method code with example usage: obj.test_single_action() without return types