');
          expect(ajax.requestUrl).to.be.equal('');

          ajax.params = {'a':'b', 'c':'d'};

          expect(ajax.queryString).to.be.equal('a=b&c=d');
          expect(ajax.requestUrl).to.be.equal('?a=b&c=d');
        });

        test('generateRequest works with empty URL and valid queryString', function() {
          ajax = fixture('BlankUrl');
          expect(ajax.url).to.be.equal(undefined);

          ajax.generateRequest();
          expect(server.requests[0].url).to.be.eql('');

          a