it('should load from a relative options.http', function (done) {
   protocol.http();
   var url = '//ajax.googleapis.com/ajax/libs/swfobject/2.2/swfobject.js';
   var options = { http: url };
   load(options, completed(url, done));
 });
 it('should load from options.http', function (done) {
   protocol.http();
   var url = 'http://ajax.googleapis.com/ajax/libs/ext-core/3.1.0/ext-core.js';
   var options = { http: url };
   load(options, completed(url, done));
 });