code: def test_empty_document():
      summarizer = EdmundsonSummarizer(
          cue_weight=0, key_weight=0, title_weight=0, location_weight=0
      )
  
      sentences = summarizer(build_document(), 10)
  
      assert len(sentences) == 0
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import pytest
  from sumy._compat import to_unicode
  from sumy.summarizers.edmundson import EdmundsonSummarizer
  from ..utils import build_document, build_document_from_string
label_desc: Use image node_id 4 for calling a global function with example usage: test_empty_document() without return types