final class CreateCartRequest
{
    /** @var string|null */
    private $token;

    /** @var string */
    private $cartId;

    public function __construct(Request $request)
    {
        $this->token = $request->query->get('token');
    }

    public static function fromHttpRequest(Request $request): self
    {
        return new self($request);
    }

    public function getCommand(): CreateCart
    {
        return (new CreateCartFactory())->createFromDTO($this);
    }

    public function getToken(): ?string
    {
        return $this->token;
    }
}

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

    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(), []);
        $bus->dispatch(Argument::any())->willReturn($envelope);

        $genericSuccessViewFactory->create(Argument::any())->willReturn(new GenericSuccessView());

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

        $this->__invoke($request);
    }

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

final class CreateCartFactory implements CreateCartFactoryInterface
{
    public function createFromDTO(CreateCartRequest $createCartRequest): CreateCart
    {
        $cartId = Uuid::uuid4()->toString();
        return new CreateCart($createCartRequest->getToken(), $cartId);
    }
}