URIcompliance { static boolean isDisplayIdValid(String newDisplayId) { if (newDisplayId==null) return false; Matcher m = displayIDpatternPat.matcher(newDisplayId); return m.matches(); }    }
@Test public void testIsDisplayIdCompliant1() { assertFalse(isDisplayIdValid("1/0")); }
@Test public void testIsDisplayIdCompliant2() { assertFalse(isDisplayIdValid("+asYnc513+")); }
@Test public void testIsDisplayIdCompliant3() { assertTrue(isDisplayIdValid("_l2I3DDv")); }