code: def test_greek_stemmer():
      greek_stemmer = Stemmer("greek")
      # The first assert covers the empty stem case.
      assert "οτ" == greek_stemmer("όταν")
      assert "εργαζ" == greek_stemmer("εργαζόμενος")
  
file_path: sumy/tests/test_stemmers.py
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import pytest
  from sumy.nlp.stemmers import null_stemmer, Stemmer
label_desc: Use image node_id 8 for calling a global function with example usage: test_greek_stemmer() without return types