assertEquals(0, ppt.addFont(PPFont.ARIAL));
assertEquals(1, ppt.getNumberOfFonts());
assertEquals(1, ppt.addFont(PPFont.TIMES_NEW_ROMAN));
assertEquals(2, ppt.addFont(PPFont.COURIER_NEW));
assertEquals(3, ppt.addFont(PPFont.WINGDINGS));
assertEquals(4, ppt.getNumberOfFonts());
assertEquals(PPFont.TIMES_NEW_ROMAN.getFontName(), ppt.getFont(1).getFontName());
assertEquals(PPFont.COURIER_NEW.getFontName(), ppt.getFont(2).getFontName());