code: def setUp(self):
      # Set up toy example for better understanding and testing
      # of this module. See the modules for the mathematical formulas
      self.segmentation = [[(1, 2)]]
      self.posting_list = {1: {2, 3, 4}, 2: {3, 5}}
      self.num_docs = 5
  
      id2token = {1: "test", 2: "doc"}
      token2id = {v: k for k, v in id2token.items()}
      dictionary = namedtuple("Dictionary", "token2id, id2token")(
          token2id, id2token
      )
      self.accumulator = text_analysis.InvertedIndexAccumulator(
          {1, 2}, dictionary
      )
      self.accumulator._inverted_index = {0: {2, 3, 4}, 1: {3, 5}}
      self.accumulator._num_docs = self.num_docs
  
file_path: gensim/gensim/test/test_direct_confirmation.py
imports: import logging
  import unittest
  from collections import namedtuple
  from gensim.topic_coherence import direct_confirmation_measure
  from gensim.topic_coherence import text_analysis
label_desc: Use image node_id 1 for calling the TestDirectConfirmationMeasure obj's underlying member method code with example usage: obj.setUp() without return types