ChoiceTypeExtension example

use Symfony\Component\Form\Tests\Fixtures\LazyChoiceTypeExtension;

class ExtendedChoiceTypeTest extends TestCase
{
    /** * @dataProvider provideTestedTypes */
    public function testChoicesAreOverridden($type)
    {
        ChoiceTypeExtension::$extendedType = $type;
        $factory = Forms::createFormFactoryBuilder()
            ->addTypeExtension(new ChoiceTypeExtension())
            ->getFormFactory()
        ;

        $choices = $factory->create($type, null, ['choice_loader' => null])->createView()->vars['choices'];

        $this->assertCount(2, $choices);
        $this->assertSame('A', $choices[0]->label);
        $this->assertSame('a', $choices[0]->value);
        $this->assertSame('B', $choices[1]->label);
        $this->assertSame('b', $choices[1]->value);
    }