for (POIXMLDocumentPart p : wb.getRelations()) {
if (p instanceof MapInfo) {
mapInfo = (MapInfo) p;
XSSFMap map = mapInfo.getXSSFMapById(1);
XSSFExportToXml exporter = new XSSFExportToXml(map);
assertEquals(1, exporter.compare("/CORSO/DOCENTE", "/CORSO/NOME"));
assertEquals(-1, exporter.compare("/CORSO/NOME", "/CORSO/DOCENTE"));
}