### Question:
Hello { public static String sayHello(String who) throws Exception { return "Hello " + who; }  static String sayHello(String who);  }### Answer:
@Test public void say_hello_test() throws Exception { Hello.sayHello("foo"); Thread.sleep(4000); }
@Test public void say_hello_test() throws Exception { Hello.sayHello("foo"); Thread.sleep(2000); }