### Question:
ParamChecker { public static String notEmpty(String str, String name) { return notEmpty(str, name, null); }  static String notEmpty(String str, String name); static String notEmpty(String str, String name, String info); static List<String> notEmptyElements(List<String> list, String name); static String validateActionName(String actionName); static boolean isValidIdentifier(String token); static int checkGTZero(int value, String name); static int checkGEZero(int value, String name); static int checkLEZero(int value, String name); static int checkInteger(String val, String name); static String checkFrequency(String val); static Date checkDateOozieTZ(String date, String name); static TimeZone checkTimeZone(String tzStr, String name); static boolean isMember(String item, String[] members, String name);  }### Answer:
@Test public void testNotEmpty() { ParamChecker.notEmpty("value", "name"); try { ParamChecker.notEmpty(null, "name"); fail(); } catch (IllegalArgumentException ex) { } try { ParamChecker.notEmpty("", "name"); fail(); } catch (IllegalArgumentException ex) { } }