 import junit.framework.TestCase;

    public class TestThatWeGetHelloWorldPrompt
    extends TestCase {

        public TestThatWeGetHelloWorldPrompt(String name) {
            super(name);
        }
        public void testSay() {
            HelloWorld hi = new HelloWorld();
            assertEquals("Hello World!", hi.say());
        }
        public static void main(String[] args) {
            junit.textui.TestRunner.run(TestThatWeGetHelloWorldPrompt.class);
        }
    }
