@Test
@Ignore
public void testStreamToFile() throws Exception {

    XLSXStreamer streamer = new XLSXStreamer();
    
    HSSFWorkbook wb = new HSSFWorkbook();
    FileOutputStream out = new FileOutputStream("workbook.xlsx");
    
    String[] headers = {"hello", "world"};
    Object[][] data = {
        {"100.0", "101.0"},
        {"200.0", "201.0"},            
    };
    Map<String, Object> additionalFields = new HashMap<>();
    additionalFields.put("add1", "val1");
    additionalFields.put("add2", "val2");
    
    streamer.writeToStream(headers, data, additionalFields, out);
    
    // The actual test is to see that this goes through without error,
    // and that the file opens in Excel without problems.
}