### Question:
Util { public static boolean isEmpty(String str) { return (str == null || "".equals(str)||str.trim().length()==0); }  static Integer getProcessId(); static String formateDate(Date date, String formate); static String formateDate(Date date); static void sleep(long millisecondes); static List<List<T>> split(List<T> lst, int count); static boolean isEmpty(String str); final static String SSS_FORMATE; }### Answer:
@Test public void isEmptyTest() { assertEquals(false, Util.isEmpty("fasdf")); assertEquals(true, Util.isEmpty("")); assertEquals(true, Util.isEmpty(null)); }