code: def test_isfile():
      FILE = os.path.join(
          PATH_TO_MEDIA_FILES,
          "silvestri-matteo-6-C0VRsagUw-unsplash.jpg",
      )
  
      assert caer.path.isfile(FILE) == os.path.isfile(FILE)
  
file_path: caer/tests/path/test_paths.py
imports: import os
  import caer
label_desc: Use image node_id 6 for calling a global function with example usage: test_isfile() without return types