### Question:
IconUtils { public static Node createErrorIcon() { GlyphFont fontAwesome = GlyphFontRegistry.font("FontAwesome"); Glyph graphic = fontAwesome.create(FontAwesome.Glyph.EXCLAMATION_TRIANGLE); graphic.setFontSize(20.0); graphic.setColor(Color.RED); return graphic; } private  IconUtils(); static List<Image> createWindowIcons(); static Node createErrorIcon(); static void initFontAwesomeOffline(); static GlyphFont getFontAwesome();  }### Answer:
@Test public void testCreateErrorIcon() { Node icon = IconUtils.createErrorIcon(); assertNotNull(icon); }