*/
public void testAdditions() throws Exception {
final Reference ref = new Reference("http://www.restlet.org");
ref.addQueryParameter("abc", "123");
assertEquals("http://www.restlet.org?abc=123", ref.toString());
ref.addQueryParameter("def", null);
assertEquals("http://www.restlet.org?abc=123&def", ref.toString());
ref.addSegment("root");
assertEquals("http://www.restlet.org/root?abc=123&def", ref.toString());
ref.addSegment("dir");
assertEquals("http://www.restlet.org/root/dir?abc=123&def",