final class CreateCartRequest
{
    /** @var string|null */
    private $token;
    /** @var string */
    private $cartId;
    public function __construct(Request $request)
    {
        $this->token = $request->query->get('token');
        $this->cartId = Uuid::uuid4()->toString();
    }
    public static function fromHttpRequest(Request $request): self
    {
        return new self($request);
    }
    public function getCommand(): CreateCart
    {
        return new CreateCart($this->token, $this->cartId);
    }
}

//**************************************************************

    function it_creates_cart(
        ValidatorInterface $validator,
        ConstraintViolationListInterface $violationList,
        MessageBusInterface $bus,
        GenericSuccessViewFactoryInterface $genericSuccessViewFactory,
        ViewHandlerInterface $viewHandler
    ): void
    {
        $request = new Request([
            'token' => 'token'
        ]);

        $createCartRequest = new CreateCartRequest($request);

        $validator->validate($createCartRequest)->willReturn($violationList);

        $envelope = new Envelope($createCartRequest->getCommand(), []);
        $bus->dispatch($createCartRequest->getCommand())->willReturn($envelope);

        $genericSuccessViewFactory->create('12345')->willReturn(new GenericSuccessView());

        $viewHandler->handle(Argument::any(), Argument::any())->willReturn(new Response());

        $this->__invoke($request);
    }

//**************************************************************

final class CreateCartAction
{
    /** @var MessageBusInterface */
    private $bus;

    /** @var ValidatorInterface */
    private $validator;

    /** @var ViewHandlerInterface */
    private $viewHandler;

    /** @var ValidationErrorViewFactoryInterface */
    private $validationErrorViewFactory;

    /** @var GenericSuccessViewFactoryInterface */
    private $genericSuccessViewFactory;

    public function __construct(
        MessageBusInterface $bus,
        ValidatorInterface $validator,
        ViewHandlerInterface $viewHandler,
        ValidationErrorViewFactoryInterface $validationErrorViewFactory,
        GenericSuccessViewFactoryInterface $genericSuccessViewFactory
    ) {
        $this->bus = $bus;
        $this->validator = $validator;
        $this->viewHandler = $viewHandler;
        $this->validationErrorViewFactory = $validationErrorViewFactory;
        $this->genericSuccessViewFactory = $genericSuccessViewFactory;
    }

    public function __invoke(Request $request): Response
    {
        $createCartRequest = CreateCartRequest::fromHttpRequest($request);

        $validationResults = $this->validator->validate($createCartRequest);

        if (0 !== count($validationResults)) {
            return $this->viewHandler->handle(View::create(
                $this->validationErrorViewFactory->create($validationResults),
                Response::HTTP_BAD_REQUEST
            ));
        }

        $createCartCommand = $createCartRequest->getCommand();

        $this->bus->dispatch($createCartCommand);

        return $this->viewHandler->handle(View::create(
            $this->genericSuccessViewFactory->create($createCartCommand->cartId())
        ));
    }
}