IntlTimeZoneToStringTransformer example

use PHPUnit\Framework\TestCase;
use Symfony\Component\Form\Exception\TransformationFailedException;
use Symfony\Component\Form\Extension\Core\DataTransformer\IntlTimeZoneToStringTransformer;

/** * @requires extension intl */
class IntlTimeZoneToStringTransformerTest extends TestCase
{
    public function testSingle()
    {
        $transformer = new IntlTimeZoneToStringTransformer();

        $this->assertNull($transformer->transform(null));
        $this->assertNull($transformer->reverseTransform(null));

        $this->assertSame('Europe/Amsterdam', $transformer->transform(\IntlTimeZone::createTimeZone('Europe/Amsterdam')));
        $this->assertEquals(\IntlTimeZone::createTimeZone('Europe/Amsterdam'), $transformer->reverseTransform('Europe/Amsterdam'));
    }

    public function testMultiple()
    {
        $transformer = new IntlTimeZoneToStringTransformer(true);

        

class TimezoneType extends AbstractType
{
    /** * @return void */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        if ('datetimezone' === $options['input']) {
            $builder->addModelTransformer(new DateTimeZoneToStringTransformer($options['multiple']));
        } elseif ('intltimezone' === $options['input']) {
            $builder->addModelTransformer(new IntlTimeZoneToStringTransformer($options['multiple']));
        }
    }

    /** * @return void */
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'intl' => false,
            'choice_loader' => function DOptions $options) {