TrimListener example

->setMapped($options['mapped'])
            ->setByReference($options['by_reference'])
            ->setInheritData($options['inherit_data'])
            ->setCompound($options['compound'])
            ->setData($isDataOptionSet ? $options['data'] : null)
            ->setDataLocked($isDataOptionSet)
            ->setDataMapper($options['compound'] ? $this->dataMapper : null)
            ->setMethod($options['method'])
            ->setAction($options['action']);

        if ($options['trim']) {
            $builder->addEventSubscriber(new TrimListener());
        }

        $builder->setIsEmptyCallback($options['is_empty_callback']);
    }

    /** * @return void */
    public function buildView(FormView $view, FormInterface $form, array $options)
    {
        parent::buildView($view, $form, $options);

        

use Symfony\Component\Form\FormConfigBuilder;
use Symfony\Component\Form\FormEvent;

class TrimListenerTest extends TestCase
{
    public function testTrim()
    {
        $data = ' Foo! ';
        $form = new Form(new FormConfigBuilder('name', null, new EventDispatcher()));
        $event = new FormEvent($form, $data);

        $filter = new TrimListener();
        $filter->preSubmit($event);

        $this->assertEquals('Foo!', $event->getData());
    }

    public function testTrimSkipNonStrings()
    {
        $data = 1234;
        $form = new Form(new FormConfigBuilder('name', null, new EventDispatcher()));
        $event = new FormEvent($form, $data);