code: def test_lines(document):
      assert document.lines == [
          "line 1",
          "line 2",
          "line 3",
          "line 4",
          "",
      ]
  
file_path: catboost/contrib/python/prompt-toolkit/py2/tests/test_document.py
imports: from __future__ import unicode_literals
  import pytest
  from prompt_toolkit.document import Document
label_desc: Use image node_id 5 for calling a global function with example usage: test_lines(document) without return types