code: def test_get_file_name(self):
      paths = self.config["data"]["train"]["paths"]
      self.assertEqual(get_file_len(paths), 300)
  
file_path: delta/delta/data/utils/common_utils_test.py
imports: import os
  from pathlib import Path
  import delta.compat
  from delta import utils
  from delta import PACKAGE_ROOT_DIR
  from delta.data.utils.common_utils import get_file_len
label_desc: Use image node_id 3 for calling the CommonUtilsTest obj's underlying member method code with example usage: obj.test_get_file_name() without return types