Symfony\Component\Templating\PhpEngine::addHelpers PHP Method

    public function addHelpers(array $helpers)
    {
        foreach ($helpers as $alias => $helper) {
            $this->set($helper, is_int($alias) ? null : $alias);
        }
    }

 /**
  * {@inheritdoc}
  */
 protected function setUp()
 {
     parent::setUp();
     $this->phpEngine = new PhpEngine(new TemplateNameParser(), new FilesystemLoader(__DIR__ . '/../../Resources/views/Form/%name%'));
     $this->formHelperMock = $this->getMockBuilder('Symfony\\Bundle\\FrameworkBundle\\Templating\\Helper\\FormHelper')->disableOriginalConstructor()->getMock();
     $this->formHelperMock->expects($this->any())->method('getName')->will($this->returnValue('form'));
     $this->phpEngine->addHelpers(array($this->formHelperMock, new CKEditorHelper($this->containerMock)));
 }