XSSFWorkbook hssfWorkbook = new XSSFWorkbook();
ExcelColorProducer colorProducer = new StaticExcelColorSupport();
ExcelFontFactory ff = new ExcelFontFactory(hssfWorkbook, colorProducer);
CreationHelper ch = hssfWorkbook.getCreationHelper();
ExcelTextExtractor te = new ExcelTextExtractor(metaData, colorProducer, ch, ff);
Object compute = te.compute((RenderBox) second);
assertTrue(compute instanceof RichTextString);
XSSFRichTextString rt = (XSSFRichTextString) compute;
assertEquals(4, rt.numFormattingRuns());
}