### Question:
ELConstantsFunctions { public static String timestamp() { return DateUtils.formatDateOozieTZ(new Date()); }  static Object firstNotNull(Object o1, Object o2); static String concat(String s1, String s2); static String replaceAll(String src, String regex, String replacement); static String appendAll(String src, String append, String delimeter); static String trim(String input); static String timestamp(); static String urlEncode(String input); static String toJsonStr(Map<String, String> map); static String toPropertiesStr(Map<String, String> map); static String toConfigurationStr(Map<String, String> map); static final long KB; static final long MB; static final long GB; static final long TB; static final long PB; static final int SUBMIT_MINUTES; static final int SUBMIT_HOURS; static final int SUBMIT_DAYS; }### Answer:
@Test public void testTimestamp() throws Exception { String s = ELConstantsFunctions.timestamp(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'"); sdf.setTimeZone(TimeZone.getTimeZone("UTC")); assertNotNull(sdf.parse(s)); }