convertor.parse(fileName, baos, XSLT_FILE);
XmlConfigurationParser newParser = new XmlConfigurationParser();
XmlConfigurationParser2x oldParser = new XmlConfigurationParser2x();
Configuration newConfig = newParser.parseStream(new ByteArrayInputStream(baos.toByteArray()));
Configuration oldConfig = oldParser.parseFile(fileName);
assert oldConfig.equals(newConfig);
}