MAGETWO-91540: REST API extension_attributes for configurable products is empty when using search criteria on products

- Fix unit tests

Author: YuliyaLabudova

app/code/Magento/Catalog/Test/Unit/Model/ProductRepositoryTest.php

@@ -28,7 +28,6 @@
 use Magento\Framework\Api\SearchCriteria\CollectionProcessorInterface;
 use Magento\Framework\Api\SearchCriteriaBuilder;
 use Magento\Framework\DB\Adapter\ConnectionException;
-use Magento\Framework\EntityManager\Operation\Read\ReadExtensions;
 use Magento\Framework\Filesystem;
 use Magento\Framework\Serialize\Serializer\Json;
 use Magento\Framework\TestFramework\Unit\Helper\ObjectManager;
@@ -180,11 +179,6 @@ class ProductRepositoryTest extends \PHPUnit\Framework\TestCase
      */
     private $cacheLimit = 2;
 
-    /**
-     * @var ReadExtensions|\PHPUnit_Framework_MockObject_MockObject
-     */
-    private $readExtensionsMock;
-
     /**
      * @SuppressWarnings(PHPMD.ExcessiveMethodLength)
      */
@@ -298,8 +292,6 @@ function ($value) {
                     }
                 )
             );
-        $this->readExtensionsMock = $this->getMockBuilder(ReadExtensions::class)
-            ->disableOriginalConstructor()->getMock();
 
         $this->model = $this->objectManager->getObject(
             ProductRepository::class,
@@ -323,8 +315,7 @@ function ($value) {
                 'mediaGalleryProcessor' => $this->mediaGalleryProcessor,
                 'collectionProcessor' => $this->collectionProcessor,
                 'serializer' => $this->serializerMock,
-                'cacheLimit' => $this->cacheLimit,
-                'readExtensions' => $this->readExtensionsMock,
+                'cacheLimit' => $this->cacheLimit
             ]
         );
     }
@@ -777,8 +768,6 @@ public function testGetList()
         $collectionMock->expects($this->once())->method('load');
         $collectionMock->expects($this->once())->method('addCategoryIds');
         $collectionMock->expects($this->atLeastOnce())->method('getItems')->willReturn([$this->product]);
-        $this->readExtensionsMock->expects($this->once())->method('execute')->with($this->product);
-        $collectionMock->expects($this->atLeastOnce())->method('getItems')->willReturn([$this->product]);
         $collectionMock->expects($this->once())->method('getSize')->willReturn(128);
         $searchResultsMock = $this->createMock(\Magento\Catalog\Api\Data\ProductSearchResultsInterface::class);
         $searchResultsMock->expects($this->once())->method('setSearchCriteria')->with($searchCriteriaMock);