public void testMessageFromJsonMissing() throws Exception {
   try {
     Message test = JsonConverter.messageFromJson(jsonMessageMissing);
     fail("Should of erred");
   } catch (Exception e) {
   }
 }
 public void testMessageFromJsonFull() throws Exception {
   Message test = JsonConverter.messageFromJson(jsonMessageFull);
   assertEquals(test.getMessage(), "Hi");
   assertEquals(test.getSender(), 205);
 }