def testValidRootCallback(self):
    ExtendedAttributes.setCallbackFor('root', 'test',
                                     _set_callback, _get_callback)
    result = ExtendedAttributes.getXAttr('root', '/', 'test')

    self.assertEquals(result[0], 'root')
    self.assertEquals(result[1], '/')

    result = ExtendedAttributes.setXAttr('root', '/', 'test', 'value')

    self.assertEquals(result[0], 'root')
    self.assertEquals(result[1], '/')
    self.assertEquals(result[2], 'value')