private void checkFormat(Wom3ImageFormat format, String value) { l.setFormat(format); assertEquals(format, l.getFormat()); assertEquals(value, l.getAttribute("format")); l.setFormat(null); assertEquals("", l.getAttribute("format")); assertNull(l.getFormat()); l.setAttribute("format", value); assertEquals(format, l.getFormat()); assertEquals(value, l.getAttribute("format")); l.setAttribute("format", null); assertEquals("", l.getAttribute("format")); assertNull(l.getFormat()); }