DummyFirstChildQuux example

        $jsonData = '{"bar":{"value":"baz"}}';

        $serializer = new Serializer([new ObjectNormalizer()], ['json' => new JsonEncoder()]);

        $this->assertEquals(new Foo(new Bar('baz')), $serializer->deserialize($jsonData, Foo::class, 'json'));
    }

    public function testDeserializeAndSerializeAbstractObjectsWithTheClassMetadataDiscriminatorResolver()
    {
        $example = new AbstractDummyFirstChild('foo-value', 'bar-value');
        $example->setQuux(new DummyFirstChildQuux('quux'));

        $loaderMock = new class() implements ClassMetadataFactoryInterface {
            public function getMetadataFor($value): ClassMetadataInterface
            {
                if (AbstractDummy::class === $value) {
                    return new ClassMetadata(
                        AbstractDummy::class,
                        new ClassDiscriminatorMapping('type', [
                            'first' => AbstractDummyFirstChild::class,
                            'second' => AbstractDummySecondChild::class,
                        ])
                    );