code: def test_download_url() -> None:
      url = "https://images.freeimages.com/images/large-previews/5c6/sunset-jungle-1383333.jpg"
      file_path = utils.download_url("/tmp", url)
      assert os.path.exists(file_path)
  
imports: import os
  import numpy
  from model_hub import utils
label_desc: Use image node_id 3 for calling a global function with example usage: test_download_url() without return types