code: def test_default_value():
      """Test that default value is given only when nothing else is available"""
      config = Configuration()
      config.add_option("test", option_type=str, default="voici_voila")
      assert config.test == "voici_voila"
  
imports: import argparse
  import logging
  import os
  import pytest
  import yaml
  from orion.core.io.config import Configuration, ConfigurationError
label_desc: Use image node_id 18 for calling a global function with example usage: test_default_value() without return types