code: def setUp(self):
      self.tokens = ["a", "b", "c", "d", "e", "f"]
      self.review_data = [("76", "93", "a b c"), ("76", "257", "b c c")]
      self.uid_map = {"76": 0, "642": 1, "930": 2}
      self.iid_map = {"93": 0, "257": 1, "705": 2}
      self.dok_matrix = np.array(
          [
              [4, 4, 0],
              [0, 4, 0],
              [0, 4, 0],
          ],
          dtype="int",
      )
  
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 1 for calling the TestReviewModality obj's underlying member method code with example usage: obj.setUp() without return types