Util { public static Date tomorrow() { return addDaysToDt(1); } private  Util(); static String generateUUID(); static String generateDbUUID(); static Set<T> asSet(T... values); static Date tomorrow(); static Date yesterday(); static Date midnight(); static Date addDaysToDt(int dayField); static Date addMinutesToDt(int minuteField); static Date toDate(String dt); static T assertNotNull(T value, String message); static boolean equals(String str, String str1); static void closeSafely(Object closable, String msg); static String capitalize(String str); static long generateUniqueLong(); static String toBase64(byte[] data); static SimpleDateFormat getUTCDateFormat(); static String readFile(InputStream is); static String hash(String password); static String toJson(Object anObject); static T fromJson(String json, Class<T> clazz); @SuppressWarnings("rawtypes") static String getClassName(Class c); static String getClassName(String fullClassName); static String reverseEndian(String in); static String transformUuid(String uuid); static List<String> getPossibleUuids(String... ids); static boolean isUuid(String uuid); static String collectionToString(Collection c); static boolean collectionsAreEqual(Collection<T> c1, Collection<T> c2); static boolean collectionsAreEqual(Collection<T> c1, Collection<T> c2, Comparator<T> comp); static String getHostname(); static final String UTC_STR; }
@Test public void tomorrow() { long tolerance = 500; Calendar cal = Calendar.getInstance(); cal.add(Calendar.DAY_OF_MONTH, 1); long expected = cal.getTimeInMillis(); long actual = Util.yesterday().getTime(); assertTrue(actual - expected <= tolerance); }