code: def setUp(self):
      copyfile(self.ori_db, self.bk_db)
  
imports: import unittest
  import os
  from shutil import copyfile, rmtree
  from subprocess import call
  from aup import compression, Experiment, BasicConfig
  from aup.utils import get_default_username
  from aup.compression.utils import verify_compression_config, run_non_automatic_experiment, adjust_compression_config
label_desc: Use image node_id 1 for calling the CompressorMainTest obj's underlying member method code with example usage: obj.setUp() without return types