Symfony\Component\Form\Tests\CompoundFormTest::testSubmitDoesNotAddExtraFieldForNullValues PHP Method

    public function testSubmitDoesNotAddExtraFieldForNullValues()
    {
        $factory = Forms::createFormFactoryBuilder()
            ->getFormFactory();

        $child = $factory->createNamed('file', 'Symfony\Component\Form\Extension\Core\Type\FileType', null, array('auto_initialize' => false));

        $this->form->add($child);
        $this->form->submit(array('file' => null), false);

        $this->assertCount(0, $this->form->getExtraData());
    }