SerializerRuntime example

public static function serializerDataProvider(): \Generator
    {
        yield ['{{ object|serialize }}', '{"name":"howdy","title":"fixture"}'];
        yield ['{{ object|serialize(\'yaml\') }}', '{ name: howdy, title: fixture }'];
        yield ['{{ object|serialize(\'yaml\', {groups: \'read\'}) }}', '{ name: howdy }'];
    }

    private function getTwig(string $template): Environment
    {
        $meta = new ClassMetadataFactory(new AnnotationLoader());
        $runtime = new SerializerRuntime(new Serializer([new ObjectNormalizer($meta)], [new JsonEncoder(), new YamlEncoder()]));

        $mockRuntimeLoader = $this->createMock(RuntimeLoaderInterface::class);
        $mockRuntimeLoader
            ->method('load')
            ->willReturnMap([
                ['Symfony\Bridge\Twig\Extension\SerializerRuntime', $runtime],
            ])
        ;

        $twig = new Environment(new ArrayLoader(['template' => $template]));
        $twig->addExtension(new SerializerExtension());