code: def test_assert_markdown_links_not_broken() -> None:
      folder = Path(__file__).parents[2].expanduser().absolute()
      assert (
          folder / "README.md"
      ).exists(), f"Wrong root folder: {folder}"
      assert testing._get_all_markdown_links(
          folder
      ), "There should be at least one hyperlink!"
      testing.assert_markdown_links_not_broken(folder)
  
file_path: nevergrad/nevergrad/common/test_testing.py
imports: import sys
  import unittest
  import platform
  import subprocess
  import typing
  from pathlib import Path
  import pytest
  import numpy
  from .None import testing
label_desc: Use image node_id 3 for calling a global function with example usage: test_assert_markdown_links_not_broken() without return types