Fixed creating shipping labels in part-shipment

app/code/Magento/Shipping/view/adminhtml/templates/order/packaging/popup.phtml

@@ -50,7 +50,11 @@ $girthEnabled = $block->isDisplayGirthValue() && $block->isGirthAllowed() ? 1 :
             }
         });
         packaging.setItemQtyCallback(function(itemId){
-            var item = $$('[name="shipment[items]['+itemId+']"]')[0];
+            var item = $$('[name="shipment[items]['+itemId+']"]')[0],
+                itemTitle = $('order_item_' + itemId + '_title');
+            if (!itemTitle && !item) {
+                return 0;
+            }
             if (item && !isNaN(item.value)) {
                 return item.value;
             }

dev/tests/integration/testsuite/Magento/Shipping/Block/Adminhtml/Order/AddToPackageTest.php

@@ -0,0 +1,94 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Shipping\Block\Adminhtml\Order;
+
+use Magento\Backend\Block\Template;
+use Magento\Framework\Api\SearchCriteria;
+use Magento\Framework\Api\SearchCriteriaBuilder;
+use Magento\Framework\ObjectManagerInterface;
+use Magento\Framework\Registry;
+use Magento\Sales\Api\Data\OrderInterface;
+use Magento\Sales\Api\Data\ShipmentTrackInterface;
+use Magento\TestFramework\Helper\Bootstrap;
+use PHPUnit\Framework\TestCase;
+use Magento\Sales\Api\OrderRepositoryInterface;
+
+/**
+ * Class verifies packaging popup.
+ *
+ * @magentoAppArea adminhtml
+ */
+class AddToPackageTest extends TestCase
+{
+    /**
+     * @var OrderRepositoryInterface
+     */
+    private $orderRepository;
+
+    /** @var ObjectManagerInterface */
+    private $objectManager;
+
+    /** @var Registry */
+    private $registry;
+
+    protected function setUp(): void
+    {
+        $this->objectManager = Bootstrap::getObjectManager();
+        $this->registry = $this->objectManager->get(Registry::class);
+        $this->orderRepository = $this->objectManager->get(OrderRepositoryInterface::class);
+    }
+
+    /**
+     * Loads order entity by provided order increment ID.
+     *
+     * @param string $incrementId
+     * @return OrderInterface
+     */
+    private function getOrderByIncrementId(string $incrementId) : OrderInterface
+    {
+        /** @var SearchCriteria $searchCriteria */
+        $searchCriteria = $this->objectManager->get(SearchCriteriaBuilder::class)
+            ->addFilter('increment_id', $incrementId)
+            ->create();
+
+        $items = $this->orderRepository->getList($searchCriteria)
+            ->getItems();
+
+        return array_pop($items);
+    }
+
+    /**
+     * Test that Packaging popup renders
+     *
+     * @magentoDataFixture Magento/Shipping/_files/shipping_with_carrier_data.php
+     */
+    public function testGetCommentsHtml()
+    {
+        /** @var Template $block */
+        $block = $this->objectManager->get(Packaging::class);
+
+        $order = $this->getOrderByIncrementId('100000001');
+
+        /** @var ShipmentTrackInterface $track */
+        $shipment = $order->getShipmentsCollection()->getFirstItem();
+
+        $this->registry->register('current_shipment', $shipment);
+
+        $block->setTemplate('Magento_Shipping::order/packaging/popup.phtml');
+        $html = $block->toHtml();
+        $expectedNeedle = "packaging.setItemQtyCallback(function(itemId){
+            var item = $$('[name=\"shipment[items]['+itemId+']\"]')[0],
+                itemTitle = $('order_item_' + itemId + '_title');
+            if (!itemTitle && !item) {
+                return 0;
+            }
+            if (item && !isNaN(item.value)) {
+                return item.value;
+            }
+        });";
+        $this->assertStringContainsString($expectedNeedle, $html);
+    }
+}

dev/tests/integration/testsuite/Magento/Shipping/_files/shipping_with_carrier_data.php

@@ -0,0 +1,49 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+use Magento\Catalog\Api\ProductRepositoryInterface;
+use Magento\Sales\Api\Data\OrderInterfaceFactory;
+use Magento\Sales\Api\OrderRepositoryInterface;
+use Magento\Sales\Model\Order;
+use Magento\Sales\Model\Order\ShipmentFactory;
+use Magento\TestFramework\Helper\Bootstrap;
+use Magento\TestFramework\Workaround\Override\Fixture\Resolver;
+use Magento\Framework\DB\Transaction;
+
+Resolver::getInstance()->requireDataFixture('Magento/Sales/_files/order_with_customer.php');
+
+$objectManager = Bootstrap::getObjectManager();
+/** @var Transaction $transaction */
+$transaction = $objectManager->get(Transaction::class);
+/** @var ProductRepositoryInterface $productRepository */
+$productRepository = $objectManager->create(ProductRepositoryInterface::class);
+$product = $productRepository->get('simple');
+/** @var Order $order */
+$order = $objectManager->get(OrderInterfaceFactory::class)->create()->loadByIncrementId('100000001');
+$order->setShippingDescription('UPS Next Day Air')
+    ->setShippingMethod('ups_11')
+    ->setShippingAmount(0)
+    ->setCouponCode('1234567890')
+    ->setDiscountDescription('1234567890');
+
+/** @var OrderRepositoryInterface $orderRepository */
+$orderRepository = $objectManager->create(OrderRepositoryInterface::class);
+$orderRepository->save($order);
+
+$shipmentItems = [];
+foreach ($order->getItems() as $orderItem) {
+    $shipmentItems[$orderItem->getId()] = $orderItem->getQtyOrdered();
+}
+$tracking = [
+    'carrier_code' => 'ups',
+    'title' => 'United Parcel Service',
+    'number' => '987654321'
+];
+
+$shipment = $objectManager->get(ShipmentFactory::class)->create($order, $shipmentItems, [$tracking]);
+$shipment->register();
+$transaction->addObject($shipment)->addObject($order)->save();

dev/tests/integration/testsuite/Magento/Shipping/_files/shipping_with_carrier_data_rollback.php

@@ -0,0 +1,9 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+use Magento\TestFramework\Workaround\Override\Fixture\Resolver;
+
+Resolver::getInstance()->requireDataFixture('Magento/Sales/_files/order_with_customer_rollback.php');