code: def test_input(self):
      self.assertRaises(
          ValueError,
          self.model.diff,
          self.model,
          n_ann_terms=self.n_ann_terms,
          distance="something",
      )
      self.assertRaises(
          ValueError,
          self.model.diff,
          [],
          n_ann_terms=self.n_ann_terms,
          distance="something",
      )
  
file_path: gensim/gensim/test/test_tmdiff.py
imports: import logging
  import unittest
  import numpy
  from gensim.models import LdaModel
  from gensim.test.utils import common_dictionary, common_corpus
label_desc: Use image node_id 4 for calling the TestLdaDiff obj's underlying member method code with example usage: obj.test_input() without return types