//get default font, then change 2 values and check against different values (height changes)
Font font=workbook.createFont();
((XSSFFont)font).setBold(true);
font.setUnderline(Font.U_DOUBLE);
StylesSource styleSource=new StylesTable();
long index=styleSource.putFont(font);
System.out.println("index="+index);
workbook.setStylesSource(styleSource);
fontFind=workbook.findFont(Font.BOLDWEIGHT_BOLD, Font.COLOR_NORMAL, (short)15, "Calibri", false, false, Font.SS_NONE, Font.U_DOUBLE);
assertNull(fontFind);
}