code: def test_curdir(self):
      # Test os.curdir.
      ff = grep.findfiles
      save_cwd = os.getcwd()
      os.chdir(self.path)
      filename = "test_grep.py"
      filelist = list(ff(os.curdir, filename, False))
      self.assertIn(os.path.join(os.curdir, filename), filelist)
      os.chdir(save_cwd)
  
imports: from idlelib import grep
  import unittest
  from test.support import captured_stdout
  from idlelib.idle_test.mock_tk import Var
  import os
  import re
label_desc: Use image node_id 4 for calling the FindfilesTest obj's underlying member method code with example usage: obj.test_curdir() without return types