MissingRecordAwareHSSFListener listener = new MissingRecordAwareHSSFListener(mockListen);
    req.addListenerForAllRecords(listener);
    
    POIFSFileSystem fs = new POIFSFileSystem(new FileInputStream(f));
    HSSFEventFactory factory = new HSSFEventFactory();
    factory.processWorkbookEvents(req, fs);
    
    // Check we got the dummy records
    Record[] r = (Record[])
      mockListen.records.toArray(new Record[mockListen.records.size()]);