MC-36971: Create automated test for "Calculation of invoiced child items in "sales_order_item" table for order with configurable product after partial invoice"

Author: ysapiga

dev/tests/integration/testsuite/Magento/Sales/Controller/Adminhtml/Order/Invoice/SaveTest.php

@@ -9,7 +9,9 @@
 
 use Magento\Framework\Escaper;
 use Magento\Sales\Api\Data\InvoiceInterface;
+use Magento\Sales\Api\Data\OrderItemInterface;
 use Magento\Sales\Model\Order;
+use Magento\Sales\Model\ResourceModel\Order\Item;
 use PHPUnit\Framework\Constraint\StringContains;
 
 /**
@@ -28,6 +30,9 @@ class SaveTest extends AbstractInvoiceControllerTest
     /** @var Escaper */
     private $escaper;
 
+    /** @var Item */
+    private $orderItemResource;
+
     /**
      * @inheritdoc
      */
@@ -36,6 +41,7 @@ protected function setUp(): void
         parent::setUp();
 
         $this->escaper = $this->_objectManager->get(Escaper::class);
+        $this->orderItemResource = $this->_objectManager->get(Item::class);
     }
 
     /**
@@ -173,6 +179,39 @@ public function testInvoiceWithoutQty(): void
         $this->assertErrorResponse($this->escaper->escapeHtml($expectedMessage));
     }
 
+    /**
+     * @magentoDataFixture Magento/Sales/_files/order_configurable_product.php
+     *
+     * @return void
+     */
+    public function testPartialInvoiceWitConfigurableProduct(): void
+    {
+        $order = $this->getOrder('100000001');
+        $post = $this->hydratePost([$order->getItemsCollection()->getFirstItem()->getId() => '1']);
+        $this->prepareRequest($post, ['order_id' => $order->getEntityId()]);
+        $this->dispatch('backend/sales/order_invoice/save');
+        $this->assertSessionMessages($this->containsEqual((string)__('The invoice has been created.')));
+        $orderItems = $this->getOrderItemsQtyInvoiced((int)$order->getEntityId());
+        $this->assertCount(2, $orderItems);
+        $this->assertEquals($orderItems[0]['qty_invoiced'], $orderItems[1]['qty_invoiced']);
+    }
+
+    /**
+     * Get order items qty invoiced
+     *
+     * @param int $orderId
+     * @return array
+     */
+    private function getOrderItemsQtyInvoiced(int $orderId): array
+    {
+        $connection = $this->orderItemResource->getConnection();
+        $select = $connection->select()
+            ->from($this->orderItemResource->getMainTable(), OrderItemInterface::QTY_INVOICED)
+            ->where(OrderItemInterface::ORDER_ID . ' = ?', $orderId);
+
+        return $connection->fetchAll($select);
+    }
+
     /**
      * @inheritdoc
      */