code: def test_unit_overlap_exact_match():
      tokenizer = Tokenizer("czech")
      model = TfDocumentModel(
          "Veta aká sa len veľmi ťažko hľadá.", tokenizer
      )
  
      assert unit_overlap(model, model) == approx(1.0)
  
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 8 for calling a global function with example usage: test_unit_overlap_exact_match() without return types