code: def test_augment(self):
      self.assertIsInstance(self.w.augment(" ".join(self.data)), str)
  
file_path: textaugment/tests/test_wordnet.py
imports: import unittest
  import sys
  import numpy
  from textaugment.wordnet import Wordnet
label_desc: Use image node_id 2 for calling the OutputTestCase obj's underlying member method code with example usage: obj.test_augment() without return types