code: def test_ensure_dirname(self):
      cmd = self.cmd
      cmd.option1 = os.path.dirname(__file__) or os.curdir
      cmd.ensure_dirname("option1")
      cmd.option2 = "xxx"
      self.assertRaises(
          DistutilsOptionError, cmd.ensure_dirname, "option2"
      )
  
imports: import unittest
  import os
  from test.test_support import captured_stdout, run_unittest
  from distutils.cmd import Command
  from distutils.dist import Distribution
  from distutils.errors import DistutilsOptionError
  from distutils import debug
label_desc: Use image node_id 7 for calling the CommandTestCase obj's underlying member method code with example usage: obj.test_ensure_dirname() without return types