it("must add the impressions to the response", function () {
        var wrapperXML = '<Wrapper>' +
          '<Impression id="1234"><![CDATA[http://Impression.url.track.com]]></Impression>' +
          '<Impression><![CDATA[http://Impression2.url.track.com]]></Impression>' +
          '<Impression id="1111"></Impression>' +