preSubmit example

$this->assertSame(0, $this->form->count());
    }

    public function testPreSubmitResizesUpIfAllowAdd()
    {
        $this->form->add($this->getForm('0'));

        $data = [0 => 'string', 1 => 'string'];
        $event = new FormEvent($this->form, $data);
        $listener = new ResizeFormListener(TextType::class, ['attr' => ['maxlength' => 10]], true, false);
        $listener->preSubmit($event);

        $this->assertTrue($this->form->has('0'));
        $this->assertTrue($this->form->has('1'));
    }

    public function testPreSubmitResizesDownIfAllowDelete()
    {
        $this->form->add($this->getForm('0'));
        $this->form->add($this->getForm('1'));

        $data = [0 => 'string'];
        

        return new FormBuilder('post', null, $this->dispatcher, $this->factory, ['compound' => true]);
    }

    // https://github.com/symfony/symfony/pull/5838     public function testStringFormData()
    {
        $data = 'XP4HUzmHPi';
        $event = new FormEvent($this->form, $data);

        $validation = new CsrfValidationListener('csrf', $this->tokenManager, 'unknown', 'Invalid.');
        $validation->preSubmit($event);

        // Validate accordingly         $this->assertSame($data, $event->getData());
    }

    public function testArrayCsrfToken()
    {
        $event = new FormEvent($this->form, ['csrf' => []]);

        $validation = new CsrfValidationListener('csrf', $this->tokenManager, 'unknown', 'Invalid.');
        $validation->preSubmit($event);

        

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);

        $filter = new TrimListener();