code: def test_unit_overlap_wrong_arguments():
      tokenizer = Tokenizer("english")
      model = TfDocumentModel("", tokenizer)
  
      with pytest.raises(ValueError):
          unit_overlap("model", "model")
      with pytest.raises(ValueError):
          unit_overlap("model", model)
      with pytest.raises(ValueError):
          unit_overlap(model, "model")
  
file_path: sumy/tests/test_evaluation/test_evaluation_content_based.py
imports: from __future__ import absolute_import
  from __future__ import division, print_function, unicode_literals
  import pytest
  from pytest import approx
  from sumy.evaluation import cosine_similarity, unit_overlap
  from sumy.models import TfDocumentModel
  from sumy.nlp.tokenizers import Tokenizer
label_desc: Use image node_id 7 for calling a global function with example usage: test_unit_overlap_wrong_arguments() without return types