SlideShow ppt = new SlideShow();
assertEquals(1, ppt.getNumberOfFonts());
assertEquals("Arial", ppt.getFont(0).getFontName());
//adding the same font twice
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));