old_contents: #!/usr/bin/env python
  import unittest
  
  from kiwi.ui.widgets.checkbutton import ProxyCheckButton
  
  
  class CheckButtonTest(unittest.TestCase):
      def testForBool(self):
          myChkBtn = ProxyCheckButton()
          # PyGObject bug, we cannot set bool in the constructor with
          # introspection
          #self.assertEqual(myChkBtn.props.data_type, 'bool')
  
          # this test doens't work... maybe be a pygtk bug
          #self.assertRaises(TypeError, myChkBtn.set_property, 'data-type', str)
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: #!/usr/bin/env python
  import unittest
  
  import gtk
  
  from kiwi.ui.widgets.checkbutton import ProxyCheckButton
  
  
  class CheckButtonTest(unittest.TestCase):
      def testForBool(self):
          myChkBtn = ProxyCheckButton()
          assert isinstance(myChkBtn, gtk.CheckButton)
          # PyGObject bug, we cannot set bool in the constructor with
          # introspection
          #self.assertEqual(myChkBtn.props.data_type, 'bool')
  
          # this test doens't work... maybe be a pygtk bug
          #self.assertRaises(TypeError, myChkBtn.set_property, 'data-type', str)
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add a silly assert to avoid a pyflakes warning