@Test
     public void test() {
         Comment fetchedComment = (Comment) MongoHelper.fetch(comment, "comments");
         if(fetchedComment == null)
             TestHelper.failed("comment not found");
         
         fetchedComment.setText("Edited Text");
         if(!MongoHelper.save(fetchedComment, "comments")){
             TestHelper.failed("text update failed");
         }
         
         Comment updatedComment = (Comment) MongoHelper.fetch(fetchedComment, "comments");

         TestHelper.asserting(fetchedComment.getText().equals(updatedComment.getText()));
         System.out.println("updated comment id: " + updatedComment.getId());
         
         TestHelper.passed();
     }