code: def test_cmd_cache_dir(tmp_dir, scm, dvc):
      ret = main(["cache", "dir"])
      assert ret == 0
  
file_path: dvc/tests/func/test_odb.py
imports: import os
  import stat
  import configobj
  import pytest
  from dvc.cachemgr import CacheManager
  from dvc.cli import main
  from dvc.utils import relpath
  from dvc_data.hashfile.hash_info import HashInfo
  from dvc_objects.errors import ObjectFormatError
label_desc: Use image node_id 6 for calling a global function with example usage: test_cmd_cache_dir(tmp_dir, scm, dvc) without return types