asyncTest('should not wait if scripts are added recursively', function () {
  var barrier = new ScriptExecutionBarrier();

  var scriptCounter = 0;

  window.stopAppending      = false;
  window.appendCustomScript = function () {
      var script        = document.createElement('script');
      var scriptContent = encodeURIComponent('if(!window.stopAppending)window.appendCustomScript()');

      script.src = '/xhr-test/' + scriptCounter + '?expectedResponse=' + scriptContent;
      scriptCounter++;

      document.body.appendChild(script);
  };

  barrier.SCRIPT_LOADING_TIMEOUT = 500;
  barrier.BARRIER_TIMEOUT        = 500;

  window.appendCustomScript();

  barrier
      .wait()
      .then(function () {
          window.stopAppending = true;

          // NOTE: if barrier timeout doesn't work test fails with timeout
          expect(0);
          start();
      });
});