Make calls to phantomjs sequential.

tasks/lib/phantomas.js

@@ -300,10 +300,23 @@ Phantomas.prototype.createIndexHtml = function( results ) {
  * @tested
  */
 Phantomas.prototype.executePhantomas = function() {
- var runs = [];
+ var responses = [],
+ queue,
+ gatherResponses = function( response ) {
+ responses.push( response );
+ return responses;
+ };
+
 
  return new Promise( function( resolve ) {
- var options;
+ var options,
+ url = this.options.url,
+ runPhantomas = function() {
+ return phantomas(
+ url,
+ options
+ ).then( gatherResponses );
+ };
 
  this.grunt.log.verbose.writeln(
  'Executing phantomas ( ' + this.options.numberOfRuns + ' times ) with following parameters:\n' +
@@ -319,16 +332,13 @@ Phantomas.prototype.executePhantomas = function() {
  options[ 'film-strip-dir' ] = this.imagePath + this.timestamp;
  }
 
- runs.push(
- phantomas(
- this.options.url,
- options
- )
- );
+ if ( i === 0 ) {
+ queue = runPhantomas();
+ } else {
+ queue = queue.then( runPhantomas );
+ }
  }
-
- Promise.settle( runs )
- .then( resolve )
+ queue.then( resolve )
  .catch( function( e ) {
  console.log( e );
  } );