code: def test_s3rec(self):
      config_dict = {
          "model": "S3Rec",
          "train_stage": "pretrain",
          "save_step": 1,
          "train_neg_sample_args": None,
      }
      quick_test(config_dict)
  
      config_dict = {
          "model": "S3Rec",
          "train_stage": "finetune",
          "pre_model_path": "./saved/S3Rec-test-1.pth",
          "train_neg_sample_args": None,
      }
      quick_test(config_dict)
  
imports: import os
  import unittest
  from recbole.quick_start import objective_function
label_desc: Use image node_id 1 for calling the TestSequentialRecommender obj's underlying member method code with example usage: obj.test_s3rec() without return types