code: def test_init(self):
      self.assertCountEqual(
          self.modality.vocab.idx2tok, SPECIAL_TOKENS + self.tokens
      )
  
imports: import unittest
  from collections import defaultdict
  import numpy
  import numpy.testing
  from cornac.data import TextModality, ReviewModality
  from cornac.data.text import SPECIAL_TOKENS, DEFAULT_PRE_RULES, BaseTokenizer, Vocabulary, CountVectorizer, TfidfVectorizer
label_desc: Use image node_id 2 for calling the TestTextModality obj's underlying member method code with example usage: obj.test_init() without return types