docstr: Sanity check word2vec_similarity.
docstr_tok: ["Sanity","check","word2vec_similarity","."]
code: def test_word2vec_similarity(self):
      """Sanity check word2vec_similarity."""
      accumulator = text_analysis.WordVectorsAccumulator(
          {1, 2}, self.dictionary
      )
      accumulator.accumulate(
          [["fake", "tokens"], ["tokens", "fake"]], 5
      )
  
      mean, std = indirect_confirmation_measure.word2vec_similarity(
          self.segmentation, accumulator, with_std=True
      )[0]
      self.assertNotEqual(0.0, mean)
      self.assertNotEqual(0.0, std)
  
file_path: gensim/gensim/test/test_indirect_confirmation.py
imports: import logging
  import unittest
  import numpy
  from gensim.corpora.dictionary import Dictionary
  from gensim.topic_coherence import indirect_confirmation_measure
  from gensim.topic_coherence import text_analysis
label_desc: Use image node_id 3 for calling the TestIndirectConfirmation obj's underlying member method code with example usage: obj.test_word2vec_similarity() without return types