### Question:
SearchUtils { public static boolean isBlank(String value) { return value == null || value.trim().isEmpty(); }  static Properties loadProperties(String path); static String trimToNull(String value); static List<String> safeList(List<String> values); static boolean isBlank(String value); static boolean isBlank(Object value); static String convertJsonMapToString(Map<String, Object> jsonMapValue); static DateFormat getISODateFormat(); static Date dateFromISOString(String string, boolean silent); static boolean isDateAfter(Object date, int thresholdInMinutes); static Map<String, Object> convertToJsonMap(String jsonData); static Integer getIntegerFromJsonMap(Map<String, Object> map, String key); @SuppressWarnings("unchecked") static List<String> getListOfStringsFromJsonMap(Map<String, Object> map, String key); static void mergeJsonMaps(Map<String, Object> source, Map<String, Object> target); static Map<String, Object> collapseURLParams(MultivaluedMap<String, String> params); static boolean isMysqlDialect(String databaseProductName);  }### Answer:
@Test public void isBlank_String() { Assert.assertTrue(SearchUtils.isBlank((String) null)); Assert.assertTrue(SearchUtils.isBlank("")); Assert.assertTrue(SearchUtils.isBlank(" ")); Assert.assertTrue(SearchUtils.isBlank(" ")); Assert.assertTrue(SearchUtils.isBlank(" \t")); Assert.assertFalse(SearchUtils.isBlank("a")); Assert.assertFalse(SearchUtils.isBlank("Z")); Assert.assertFalse(SearchUtils.isBlank("1")); Assert.assertFalse(SearchUtils.isBlank("-")); }
@Test public void isBlank_Object() { Assert.assertTrue(SearchUtils.isBlank((Object) null)); Assert.assertFalse(SearchUtils.isBlank(new Object())); Assert.assertTrue(SearchUtils.isBlank((Object) "")); Assert.assertTrue(SearchUtils.isBlank((Object) " ")); Assert.assertTrue(SearchUtils.isBlank((Object) " ")); Assert.assertTrue(SearchUtils.isBlank((Object) " \t")); Assert.assertFalse(SearchUtils.isBlank((Object) "a")); Assert.assertFalse(SearchUtils.isBlank((Object) "Z")); Assert.assertFalse(SearchUtils.isBlank((Object) "1")); Assert.assertFalse(SearchUtils.isBlank((Object) "-")); { List<String> l = new ArrayList<>(); Assert.assertTrue(SearchUtils.isBlank(l)); l.add("a"); Assert.assertFalse(SearchUtils.isBlank(l)); } { Map<String, String> l = new HashMap<>(); Assert.assertTrue(SearchUtils.isBlank(l)); l.put("a", "b"); Assert.assertFalse(SearchUtils.isBlank(l)); } }