- added api-functional test for product fragment

Author: lenaorobei

dev/tests/api-functional/testsuite/Magento/GraphQl/Catalog/ProductFragmentTest.php

@@ -0,0 +1,54 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\GraphQl\Catalog;
+
+use Magento\TestFramework\TestCase\GraphQlAbstract;
+
+/**
+ * Test for simple product fragment.
+ */
+class ProductFragmentTest extends GraphQlAbstract
+{
+    /**
+     * @magentoApiDataFixture Magento/Catalog/_files/product_simple.php
+     */
+    public function testSimpleProductFragment()
+    {
+        $sku = 'simple';
+        $name = 'Simple Product';
+        $price = 10;
+
+        $query = <<<QUERY
+query GetProduct {
+  products(filter: { sku: { eq: "$sku" } }) {
+    items {
+      sku
+      ...BasicProductInformation
+    }
+  }
+}
+
+fragment BasicProductInformation on ProductInterface {
+  sku
+  name
+  price {
+    regularPrice {
+      amount {
+        value
+      }
+    }
+  }
+}
+QUERY;
+        $result = $this->graphQlQuery($query);
+        $actualProductData = $result['products']['items'][0];
+        $this->assertNotEmpty($actualProductData);
+        $this->assertEquals($name, $actualProductData['name']);
+        $this->assertEquals($price, $actualProductData['price']['regularPrice']['amount']['value']);
+    }
+}