Protractor Long polling fix (author fedenunez)

clientsidescripts.js

clientSideScripts.waitForAngular = function() {
  var selector = arguments[0];
  var callback = arguments[1];
  var TIMEOUT_MS        = 18000;   // ms
  var INTERVAL_MS       = 5; //ms
  var elapsed        = 0;
  var el = document.querySelector(selector);

  // "inject" $rootScope service
  var $rootScope = angular.element(el).injector().get('$rootScope');

  // "inject" our own longpolling service 
  var modelService = angular.element(el).injector().get('model');

  var checkLoop = function() {
    if (elapsed <= TIMEOUT_MS ) {

      // check angular digest state and check our longpoll service state (modelService state)
      if (!$rootScope.$$phase && ( !modelService.isProcessing() )) {

       // everything is synchronized!
       callback(); 

      } else { 

        // somebody is still processing, wait a little bit more.
        elapsed = elapsed +  INTERVAL_MS;
        setTimeout( checkLoop, INTERVAL_MS );

      }
    }  else {
      callback( "Timedout while waiting for angular!" );
    }
  }

  //initialize checking loop
  setTimeout( checkLoop, 0 );
};