code: def test_list_images():
      DIR = PATH_TO_MEDIA_FILES
  
      images_list = caer.path.list_images(
          DIR, recursive=True, use_fullpath=True
      )
  
      assert images_list is not None
      assert (
          len(images_list) == 3
      )  # There are 3 images & 3 videos in tests/media
  
      for i in images_list:
          assert os.path.exists(i)
  
file_path: caer/tests/path/test_paths.py
imports: import os
  import caer
label_desc: Use image node_id 1 for calling a global function with example usage: test_list_images() without return types