gistfile1.java

  @Test
  public void testOnMessageMethod() {
		
		MessageListener messageListener = new MessageListener();
		Message message = new Message("hi there!");
		messageListener.onMessage(message);
		
		Assert.assertEquals(1, messageListener.getMessageCount());
		Assert.assertEquals(1, messageListener.getReceivedMessages().size());
		Assert.assertEquals(message, messageListener.getReceivedMessages().get(0));
		
		Message anotherMessage = new Message("yo yo");
		messageListener.onMessage(anotherMessage);
		
		Assert.assertEquals(2, messageListener.getMessageCount());
		Assert.assertEquals(2, messageListener.getReceivedMessages().size());
		Assert.assertEquals(anotherMessage, messageListener.getReceivedMessages().get(1));		
	}