code: def test_default_sequential_settings(self):
      para_dict = {"train_neg_sample_args": None}
      config = Config(
          model="SASRec", dataset="ml-100k", config_dict=para_dict
      )
      self.assertEqual(
          config["eval_args"]["split"], {"LS": "valid_and_test"}
      )
      self.assertEqual(config["eval_args"]["order"], "TO")
      self.assertEqual(config["eval_args"]["mode"]["valid"], "full")
      self.assertEqual(config["eval_args"]["mode"]["test"], "full")
      self.assertEqual(config["eval_args"]["group_by"], "user")
  
file_path: RecBole/tests/config/test_config.py
imports: import os
  import unittest
  from recbole.config import Config
label_desc: Use image node_id 3 for calling the TestConfigClass obj's underlying member method code with example usage: obj.test_default_sequential_settings() without return types