ACQE-8152: Verify Rest-API updating product stock_item does not delete downloadable_product_links

- Updated downloadable product fixture

Author: Karishmathakare19

dev/tests/api-functional/testsuite/Magento/Downloadable/Api/StockItemUpdatePreservesLinksTest.php

@@ -8,6 +8,7 @@
 
 namespace Magento\Downloadable\Api;
 
+use Magento\Downloadable\Test\Fixture\DownloadableProduct;
 use Magento\Framework\Webapi\Rest\Request;
 use Magento\TestFramework\Helper\Bootstrap;
 use Magento\TestFramework\TestCase\WebapiAbstract;
@@ -25,7 +26,6 @@ class StockItemUpdatePreservesLinksTest extends WebapiAbstract
 {
     private const ADMIN_TOKEN_RESOURCE_PATH = '/V1/integration/admin/token';
     private const PRODUCT_RESOURCE_PATH = '/V1/products';
-    private const TEST_PRODUCT_SKU = 'downloadable-product';
 
     /**
      * @var DataFixtureStorage
@@ -47,28 +47,67 @@ protected function setUp(): void
      * Verify that REST-API updating product stock_item does not delete downloadable_product_links
      */
     #[DataFixture(User::class, ['role_id' => 1], 'admin_user')]
-    #[DataFixture('Magento/Downloadable/_files/downloadable_product_with_files_and_sample_url.php')]
+    #[DataFixture(DownloadableProduct::class, [
+        'sku' => 'downloadable-product',
+        'name' => 'Downloadable Product Test',
+        'price' => 50.00,
+        'type_id' => 'downloadable',
+        'links_purchased_separately' => 1,
+        'links_title' => 'Downloadable Links',
+        'extension_attributes' => [
+            'website_ids' => [1],
+            'stock_item' => [
+                'use_config_manage_stock' => true,
+                'qty' => 100,
+                'is_qty_decimal' => false,
+                'is_in_stock' => true,
+            ],
+            'downloadable_product_links' => [
+                [
+                    'title' => 'Downloadable Product Link',
+                    'price' => 10.00,
+                    'link_type' => 'url',
+                    'is_shareable' => 0,
+                    'number_of_downloads' => 5,
+                    'sort_order' => 1
+                ],
+                [
+                    'title' => 'Another Link',
+                    'price' => 15.00,
+                    'link_type' => 'file',
+                    'link_file' => 'test-file.txt',
+                    'is_shareable' => 1,
+                    'number_of_downloads' => 10,
+                    'sort_order' => 2
+                ]
+            ]
+        ]
+    ], 'downloadable_product')]
     public function testStockItemUpdatePreservesDownloadableLinks()
     {
         // Steps 1-7: Generate admin access token
         $adminToken = $this->generateAdminAccessToken();
 
+        // Get the product SKU from the fixture
+        $product = $this->fixtures->get('downloadable_product');
+        $productSku = $product->getSku();
+
         // Get original product and verify it has downloadable links
-        $originalProduct = $this->getProductBySku(self::TEST_PRODUCT_SKU);
+        $originalProduct = $this->getProductBySku($productSku);
         $this->verifyProductHasDownloadableLinks($originalProduct, 'Original product should have downloadable links');
         $originalLinks = $originalProduct['extension_attributes']['downloadable_product_links'];
 
         // Steps 8-14: Update product stock_item via catalogProductRepositoryV1 PUT endpoint
-        $updatedProduct = $this->updateProductStockItem($adminToken);
+        $updatedProduct = $this->updateProductStockItem($adminToken, $productSku);
 
         // Verify the API call was successful (Step 14: Server response Code=200)
         $this->assertNotEmpty($updatedProduct, 'API response should not be empty');
-        $this->assertEquals(self::TEST_PRODUCT_SKU, $updatedProduct['sku']);
+        $this->assertEquals($productSku, $updatedProduct['sku']);
         $this->assertEquals('99.99', $updatedProduct['price']);
         $this->assertEquals('1', $updatedProduct['status']);
 
         // Steps 15-16: Verify downloadable product links are preserved
-        $this->verifyDownloadableLinksPreserved($originalLinks);
+        $this->verifyDownloadableLinksPreserved($originalLinks, $productSku);
     }
 
     /**
@@ -100,19 +139,19 @@ private function generateAdminAccessToken(): string
     /**
      * Update Product Stock Item
      */
-    private function updateProductStockItem(string $adminToken): array
+    private function updateProductStockItem(string $adminToken, string $productSku): array
     {
         $serviceInfo = [
             'rest' => [
-                'resourcePath' => self::PRODUCT_RESOURCE_PATH . '/' . self::TEST_PRODUCT_SKU,
+                'resourcePath' => self::PRODUCT_RESOURCE_PATH . '/' . $productSku,
                 'httpMethod' => Request::HTTP_METHOD_PUT,
                 'token' => $adminToken,
             ],
         ];
 
         $productData = [
             'product' => [
-                'sku' => self::TEST_PRODUCT_SKU,
+                'sku' => $productSku,
                 'status' => '1',
                 'price' => '99.99',
                 'type_id' => 'downloadable',
@@ -130,9 +169,9 @@ private function updateProductStockItem(string $adminToken): array
     /**
      * Verify Downloadable Links are Preserved
      */
-    private function verifyDownloadableLinksPreserved(array $originalLinks): void
+    private function verifyDownloadableLinksPreserved(array $originalLinks, string $productSku): void
     {
-        $updatedProduct = $this->getProductBySku(self::TEST_PRODUCT_SKU);
+        $updatedProduct = $this->getProductBySku($productSku);
         $this->verifyProductHasDownloadableLinks($updatedProduct, 'Updated product should preserve downloadable links');
 
         $preservedLinks = $updatedProduct['extension_attributes']['downloadable_product_links'];