code: def test_finish(self):
      assert not self.model.finished
      self.model.finish()
      assert self.model.finished
  
imports: import os
  from pathlib import Path
  import vowpalwabbit
  from vowpalwabbit import Workspace
  import pytest
  import warnings
  import filecmp
label_desc: Use image node_id 6 for calling the TestVW obj's underlying member method code with example usage: obj.test_finish() without return types