class_docstr: config unit test
code: def setUp(self):
      super().setUp()
      """ setup """
      self.conf_str = """
       name: Tom Smith
       age: 37
       spouse:
           name: Jane Smith
           age: 25
       children:
        - name: Jimmy Smith
          age: 15
        - name: Jenny Smith
          age: 12
      """
      self.conf_true = {
          "name": "Tom Smith",
          "age": 37,
          "spouse": {"name": "Jane Smith", "age": 25},
          "children": [
              {"name": "Jimmy Smith", "age": 15},
              {"name": "Jenny Smith", "age": 12},
          ],
      }
  
      self.conf_file = tempfile.mktemp(suffix="conf.yaml")
      with open(
          self.conf_file, "w", encoding="utf-8"
      ) as f:  # pylint: disable=invalid-name
          f.write(self.conf_str)
  
file_path: delta/delta/utils/config_test.py
imports: import tempfile
  from absl import logging
  import os
  import delta.compat
  from delta import utils
  from delta import PACKAGE_ROOT_DIR
label_desc: Use image node_id 1 for calling the ConfigTest obj's underlying member method code with example usage: obj.setUp() without return types