code: def test_atbash():
      res = decrypt(
          Config().library_default().complete_config(),
          "Svool nb mznv rh yvv zmw R orpv wlt zmw zkkov zmw givv",
      )
      assert res == answer_str
  
imports: import pytest
  from ciphey import decrypt
  from ciphey.iface import Config
label_desc: Use image node_id 4 for calling a global function with example usage: test_atbash() without return types