LYNX-910: [AC-2.4.9] Error when requesting CartItem.not_available_message or is_available field when cart inventory check is disabled

Author: deepak-soni1

app/code/Magento/QuoteGraphQl/Model/CartItem/ProductStock.php

@@ -57,8 +57,8 @@ public function __construct(
      */
     public function isProductAvailable(Item $cartItem): bool
     {
-        $requestedQty = $cartItem->getQtyToAdd() ?? $cartItem->getQty();
-        $previousQty = $cartItem->getPreviousQty() ?? 0;
+        $requestedQty = (float)($cartItem->getQtyToAdd() ?? $cartItem->getQty());
+        $previousQty = (int)$cartItem->getPreviousQty() ?? 0;
 
         if ($cartItem->getProductType() === self::PRODUCT_TYPE_BUNDLE) {
             return $this->isStockAvailableBundle($cartItem, $previousQty, $requestedQty);
@@ -98,7 +98,7 @@ public function isStockAvailableBundle(Item $cartItem, int $previousQty, $reques
         $qtyOptions = $cartItem->getQtyOptions();
         $totalRequestedQty = $previousQty + $requestedQty;
         foreach ($qtyOptions as $qtyOption) {
-            $requiredItemQty = $qtyOption->getValue();
+            $requiredItemQty = (float)$qtyOption->getValue();
             if ($totalRequestedQty) {
                 $requiredItemQty = $requiredItemQty * $totalRequestedQty;
             }

dev/tests/api-functional/testsuite/Magento/GraphQl/Quote/NotAvailableMessageTest.php

@@ -0,0 +1,112 @@
+<?php
+/**
+ * Copyright 2025 Adobe
+ * All Rights Reserved.
+ */
+declare(strict_types=1);
+
+namespace Magento\GraphQl\Quote;
+
+use Magento\Catalog\Test\Fixture\Product as ProductFixture;
+use Magento\Quote\Test\Fixture\AddProductToCart as AddProductToCartFixture;
+use Magento\Quote\Test\Fixture\GuestCart;
+use Magento\Quote\Test\Fixture\QuoteIdMask;
+use Magento\TestFramework\Fixture\Config as ConfigFixture;
+use Magento\TestFramework\Fixture\DataFixture;
+use Magento\TestFramework\Fixture\DataFixtureStorage;
+use Magento\TestFramework\Fixture\DataFixtureStorageManager;
+use Magento\TestFramework\TestCase\GraphQlAbstract;
+
+class NotAvailableMessageTest extends GraphQlAbstract
+{
+    /**
+     * @var DataFixtureStorage
+     */
+    private $fixtures;
+
+    protected function setUp(): void
+    {
+        $this->fixtures = DataFixtureStorageManager::getStorage();
+    }
+
+    #[
+        ConfigFixture('cataloginventory/options/enable_inventory_check', false, "store", "default"),
+        ConfigFixture('cataloginventory/options/not_available_message', true, "store", "default"),
+        DataFixture(ProductFixture::class, as: 'product'),
+        DataFixture(GuestCart::class, as: 'cart'),
+        DataFixture(QuoteIdMask::class, ['cart_id' => '$cart.id$'], 'quoteIdMask'),
+        DataFixture(
+            AddProductToCartFixture::class,
+            [
+                'cart_id' => '$cart.id$',
+                'product_id' => '$product.id$',
+                'qty' => 1
+            ]
+        )
+    ]
+    public function testNotAvailableMessageWithoutInventoryCheck(): void
+    {
+        $this->assertCartResponse();
+    }
+
+    #[
+        ConfigFixture('cataloginventory/options/enable_inventory_check', true, "store", "default"),
+        ConfigFixture('cataloginventory/options/not_available_message', true, "store", "default"),
+        DataFixture(ProductFixture::class, as: 'product'),
+        DataFixture(GuestCart::class, as: 'cart'),
+        DataFixture(QuoteIdMask::class, ['cart_id' => '$cart.id$'], 'quoteIdMask'),
+        DataFixture(
+            AddProductToCartFixture::class,
+            [
+                'cart_id' => '$cart.id$',
+                'product_id' => '$product.id$',
+                'qty' => 1
+            ]
+        )
+    ]
+    public function testNotAvailableMessageWithInventoryCheck(): void
+    {
+        $this->assertCartResponse();
+    }
+
+    private function assertCartResponse(): void
+    {
+        $this->assertEquals(
+            [
+                'cart' => [
+                    'itemsV2' => [
+                        'items' => [
+                            [
+                                'not_available_message' => null,
+                            ]
+                        ]
+                    ]
+                ]
+            ],
+            $this->graphQlQuery(
+                $this->getCartQuery($this->fixtures->get('quoteIdMask')->getMaskedId())
+            )
+        );
+    }
+
+    /**
+     * Get cart query with not available message
+     *
+     * @param string $maskedQuoteId
+     * @return string
+     */
+    private function getCartQuery(string $maskedQuoteId): string
+    {
+        return <<<QUERY
+            {
+              cart(cart_id: "{$maskedQuoteId}") {
+                itemsV2 {
+                  items {
+                    not_available_message
+                  }
+                }
+              }
+            }
+        QUERY;
+    }
+}