@Test public void testContents() { DefaultMessage message = new DefaultMessage(); String str = "xxxxxxx"; message.setContent(String.class, str); message.setContent(Integer.class, new Integer(12)); assertSame(str, message.getContent(String.class)); assertNotNull(message.getContent(Integer.class)); message.removeContent(String.class); assertNull(message.getContent(String.class)); }