CsrfValidationListener example

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        if (!$options['csrf_protection']) {
            return;
        }

        $builder
            ->addEventSubscriber(new CsrfValidationListener(
                $options['csrf_field_name'],
                $options['csrf_token_manager'],
                $options['csrf_token_id'] ?: ($builder->getName() ?: $builder->getType()->getInnerType()::class),
                $options['csrf_message'],
                $this->translator,
                $this->translationDomain,
                $this->serverParams
            ))
        ;
    }

    

protected function getBuilder()
    {
        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.');