code: def test_augment(self):
      self.assertIsInstance(
          self.w.augment(self.data), str, msg="Input must be a string"
      )
      self.assertEqual(
          self.w.augment("4"), "4", msg="Input should not be numbers"
      )
  
file_path: textaugment/tests/test_word2vec.py
imports: import unittest
  import sys
  from textaugment.word2vec import Word2vec
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