code: def test_is_not_clean(self):
      filename = str(uuid.uuid4())
      subprocess.call(["touch", filename])
      is_clean = git_util.is_clean()
      os.remove(filename)
      self.assertFalse(is_clean)
  
file_path: studio/tests/git_util_test.py
imports: import unittest
  import tempfile
  import os
  import subprocess
  import uuid
  import re
  from studio import git_util
label_desc: Use image node_id 3 for calling the GitUtilTest obj's underlying member method code with example usage: obj.test_is_not_clean() without return types