new_contents: import sys
  
  from bento.misc.testing \
      import \
          SubprocessTestCase
  
  from bento.commands.convert \
      import \
          monkey_patch
  
  class TestMonkeyPath(SubprocessTestCase):
      def test_distutils(self):
          monkey_patch("distutils", "setup.py")
          self.assertTrue("setuptools" not in sys.modules)
  
      def test_setuptools(self):
          monkey_patch("setuptools", "setup.py")
          self.assertTrue("setuptools" in sys.modules)
  
subject: add monkey patch test for convert command.