MAGETWO-92773: [GraphQL] Products cannot be fetched in parent/anchor …

…category #89

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

@@ -7,6 +7,7 @@
 
 namespace Magento\GraphQl\Catalog;
 
+use Magento\Catalog\Api\Data\CategoryInterface;
 use Magento\Framework\DataObject;
 use Magento\TestFramework\TestCase\GraphQlAbstract;
 use Magento\Catalog\Api\Data\ProductInterface;
@@ -285,10 +286,22 @@ public function testCategoryProducts()
      */
     public function testAnchorCategory()
     {
-        $categoryId = 3;
+        /** @var \Magento\Catalog\Model\ResourceModel\Category\Collection $categoryCollection */
+        $categoryCollection = $this->objectManager->create(
+            \Magento\Catalog\Model\ResourceModel\Category\Collection::class
+        );
+        $categoryCollection->addFieldToFilter('name', 'Category 1');
+        $category = $categoryCollection->getFirstItem();
+        /** @var \Magento\Framework\EntityManager\MetadataPool $entityManagerMetadataPool */
+        $entityManagerMetadataPool = $this->objectManager->create(\Magento\Framework\EntityManager\MetadataPool::class);
+        $categoryLinkField = $entityManagerMetadataPool->getMetadata(CategoryInterface::class)->getLinkField();
+        $categoryId = $category->getData($categoryLinkField);
+        $this->assertNotEmpty($categoryId, "Preconditions failed: category is not available.");
+
         $query = <<<QUERY
 {
   category(id: {$categoryId}) {
+    name
     products(sort: {sku: ASC}) {
       total_count
       items {
@@ -302,6 +315,7 @@ public function testAnchorCategory()
         $response = $this->graphQlQuery($query);
         $expectedResponse = [
             'category' => [
+                'name' => 'Category 1',
                 'products' => [
                     'total_count' => 3,
                     'items' => [