MC-37620: [GraphQl] WishListItemInterface implementation for GroupedProduct and incomplete implementation for GiftCardProduct

- Added tests

Author: Prabhu Ram

dev/tests/api-functional/testsuite/Magento/GraphQl/GroupedProduct/AddGroupedProductToWishlistTest.php

@@ -0,0 +1,123 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\GraphQl\GroupedProduct;
+
+use Magento\Framework\Exception\AuthenticationException;
+use Magento\Integration\Api\CustomerTokenServiceInterface;
+use Magento\TestFramework\Helper\Bootstrap;
+use Magento\TestFramework\TestCase\GraphQlAbstract;
+use Magento\Wishlist\Model\Item;
+use Magento\Wishlist\Model\WishlistFactory;
+
+class AddGroupedProductToWishlistTest extends GraphQlAbstract
+{
+    /**
+     * @var CustomerTokenServiceInterface
+     */
+    private $customerTokenService;
+
+    /**
+     * @var WishlistFactory
+     */
+    private $wishlistFactory;
+
+    /**
+     * Set Up
+     */
+    protected function setUp(): void
+    {
+        $objectManager = Bootstrap::getObjectManager();
+        $this->customerTokenService = $objectManager->get(CustomerTokenServiceInterface::class);
+        $this->wishlistFactory = $objectManager->get(WishlistFactory::class);
+    }
+
+    /**
+     * @magentoApiDataFixture Magento/GroupedProduct/_files/product_grouped.php
+     * @magentoConfigFixture default_store wishlist/general/active 1
+     * @magentoApiDataFixture Magento/Customer/_files/customer.php
+     */
+    public function testAllFieldsGroupedProduct()
+    {
+        $productSku = 'grouped-product';
+        $customerId = 1;
+        $qty = 1;
+        $mutation = $this->getMutation($productSku, $qty);
+        $response = $this->graphQlMutation($mutation, [], '', $this->getHeaderMap());
+
+        $wishlist = $this->wishlistFactory->create()->loadByCustomerId($customerId, true);
+        /** @var Item $item */
+        $item = $wishlist->getItemCollection()->getFirstItem();
+
+        $this->assertArrayHasKey('addProductsToWishlist', $response);
+        $this->assertArrayHasKey('wishlist', $response['addProductsToWishlist']);
+        $response = $response['addProductsToWishlist']['wishlist'];
+        $this->assertEquals($wishlist->getItemsCount(), $response['items_count']);
+        $this->assertEquals($wishlist->getSharingCode(), $response['sharing_code']);
+        $this->assertEquals($wishlist->getUpdatedAt(), $response['updated_at']);
+        $this->assertEquals((int) $item->getQty(), $response['items_v2'][0]['quantity']);
+        $this->assertEquals($item->getAddedAt(), $response['items_v2'][0]['added_at']);
+        $this->assertEquals($productSku, $response['items_v2'][0]['product']['sku']);
+    }
+
+    private function getMutation(
+        string $sku,
+        int $qty,
+        int $wishlistId = 0
+    ): string {
+        return <<<MUTATION
+mutation {
+  addProductsToWishlist(
+    wishlistId: {$wishlistId},
+    wishlistItems: [
+      {
+        sku: "{$sku}"
+        quantity: {$qty}
+      }
+    ]
+) {
+    user_errors {
+      code
+      message
+    }
+    wishlist {
+      id
+      sharing_code
+      items_count
+      updated_at
+      items_v2 {
+        id
+        description
+        quantity
+        added_at
+        product {
+          sku
+        }
+      }
+    }
+  }
+}
+MUTATION;
+    }
+
+    /**
+     * Authentication header map
+     *
+     * @param string $username
+     * @param string $password
+     *
+     * @return array
+     *
+     * @throws AuthenticationException
+     */
+    private function getHeaderMap(string $username = 'customer@example.com', string $password = 'password'): array
+    {
+        $customerToken = $this->customerTokenService->createCustomerAccessToken($username, $password);
+
+        return ['Authorization' => 'Bearer ' . $customerToken];
+    }
+}