public void BuildRosterIq()
        {
            var expectedXml1 = Resource.Get("Xmpp.Client.rosteriq1.xml");
            var expectedXml2 = Resource.Get("Xmpp.Client.rosteriq2.xml");

            var rosterIq = new IqQuery <Matrix.Xmpp.Roster.Roster>();

            rosterIq.RemoveAttribute("id");
            rosterIq.ShouldBe(expectedXml1);

            Matrix.Xmpp.Roster.Roster roster = rosterIq.Query;
            roster.ShouldBe(expectedXml2);
        }