'Make sure a tag that\'s been fixed exports as the original tag type'

def test_fixed_xml_tag(self):

    root = etree.Element('error')
    good_xml = '<sequential    display_name="fixed"><video    url="hi"/></sequential>'
    root.text = good_xml
    xml_str_in = etree.tostring(root)
    system = self.get_system()
    descriptor = system.process_xml(xml_str_in)
    node = etree.Element('unknown')
    descriptor.add_xml_to_node(node)
    self.assertEqual(node.tag, 'sequential')
