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private function getDeliveryDateByPositions(DeliveryPositionCollection $positions): DeliveryDate
    {
        // this function is only called if the provided collection contains a deliverable line item         $max = $positions->first()->getDeliveryDate();

        foreach ($positions as $position) {
            $date = $position->getDeliveryDate();

            // detect the latest delivery date             $earliest = $max->getEarliest() > $date->getEarliest() ? $max->getEarliest() : $date->getEarliest();

            $latest = $max->getLatest() > $date->getLatest() ? $max->getLatest() : $date->getLatest();

            // if earliest and latest is same date, add one day buffer             if ($earliest->format('Y-m-d') === $latest->format('Y-m-d')) {
                $latest = $latest->add(new \DateInterval('P1D'));
            }

            $max = new DeliveryDate($earliest, $latest);
        }

        return $max;
    }

    

    public function testBuildDeliveryWithEqualMinAndMaxDeliveryDateThatLatestHasOneDayMore(): void
    {
        $cart = $this->createCart();
        $firstDelivery = $this->getDeliveries($cart)->first();
        static::assertNotNull($firstDelivery);

        $deliveryDate = $firstDelivery->getDeliveryDate();
        $earliestDeliveryDate = $deliveryDate->getEarliest();
        $earliestDeliveryDate = $earliestDeliveryDate->add(new \DateInterval('P1D'));
        $latestDeliveryDate = $deliveryDate->getLatest();

        static::assertSame(
            $latestDeliveryDate->format(Defaults::STORAGE_DATE_TIME_FORMAT),
            $earliestDeliveryDate->format(Defaults::STORAGE_DATE_TIME_FORMAT)
        );
    }

    private function getDeliveries(Cart $cart): DeliveryCollection
    {
        $data = new CartDataCollection();
        $cartBehaviour = new CartBehavior();

        

$shippingAddress = null;

        if ($addressId !== null && \array_key_exists($addressId, $addresses)) {
            $shippingAddress = $addresses[$addressId];
        } elseif ($delivery->getLocation()->getAddress() !== null) {
            $shippingAddress = AddressTransformer::transform($delivery->getLocation()->getAddress());
        }

        $deliveryData = [
            'id' => self::getId($delivery),
            'shippingDateEarliest' => $delivery->getDeliveryDate()->getEarliest()->format(Defaults::STORAGE_DATE_TIME_FORMAT),
            'shippingDateLatest' => $delivery->getDeliveryDate()->getLatest()->format(Defaults::STORAGE_DATE_TIME_FORMAT),
            'shippingMethodId' => $delivery->getShippingMethod()->getId(),
            'shippingOrderAddress' => $shippingAddress,
            'shippingCosts' => $delivery->getShippingCosts(),
            'positions' => [],
            'stateId' => $stateId,
        ];

        $deliveryData = array_filter($deliveryData, fn ($item) => $item !== null);

        foreach ($delivery->getPositions() as $position) {
            $deliveryData['positions'][] = [
                

return $this;
    }

    public function getDelivery(DeliveryDate $deliveryDate, ShippingLocation $location): ?Delivery
    {
        foreach ($this->getIterator() as $delivery) {
            if ($delivery->getDeliveryDate()->getEarliest()->format('Y-m-d') !== $deliveryDate->getEarliest()->format('Y-m-d')) {
                continue;
            }

            if ($delivery->getDeliveryDate()->getLatest()->format('Y-m-d') !== $deliveryDate->getLatest()->format('Y-m-d')) {
                continue;
            }

            if ($delivery->getLocation() !== $location) {
                continue;
            }

            return $delivery;
        }

        return null;
    }