@Test
 public void testInvalidOption() {
   Session session = Session.createTestSession();
   session.handleInput("bogus");
   assertEquals(Constants.invalidOptionString, session.history(-2));
   assertTrue(session.lastMessage().startsWith(Constants.mainMenuString));
 }
 @Test
 public void testQuitOption() {
   Session session = Session.createTestSession();
   session.handleInput("quit");
   assertEquals(Constants.quitString, session.lastMessage());
 }