### Question:
HelloWorldImpl implements HelloWorld { public String sayHi(String text) { return "Hello " + text; }  String sayHi(String text);  }### Answer:
@Test public void testSayHi() { HelloWorldImpl helloWorldImpl = new HelloWorldImpl(); String response = helloWorldImpl.sayHi("Sam"); assertEquals("HelloWorldImpl not properly saying hi", "Hello Sam", response); }