MAGETWO-75457: [Backport] - Fix for #4530 $product->getRatingSummary() always returns null […] #10248 - for 2.2

Author: irenelagno

app/code/Magento/Review/Block/Product/ReviewRenderer.php

@@ -57,6 +57,10 @@ public function getReviewsSummaryHtml(
         $templateType = self::DEFAULT_VIEW,
         $displayIfNoReviews = false
     ) {
+        if (!$product->getRatingSummary()) {
+            $this->_reviewFactory->create()->getEntitySummary($product, $this->_storeManager->getStore()->getId());
+        }
+
         if (!$product->getRatingSummary() && !$displayIfNoReviews) {
             return '';
         }
@@ -68,9 +72,6 @@ public function getReviewsSummaryHtml(
 
         $this->setDisplayIfEmpty($displayIfNoReviews);
 
-        if (!$product->getRatingSummary()) {
-            $this->_reviewFactory->create()->getEntitySummary($product, $this->_storeManager->getStore()->getId());
-        }
         $this->setProduct($product);
 
         return $this->toHtml();

dev/tests/integration/testsuite/Magento/Review/Block/Product/ReviewRendererTest.php

@@ -0,0 +1,28 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+namespace Magento\Review\Block\Product;
+
+class ReviewRendererTest extends \PHPUnit\Framework\TestCase
+{
+    /**
+     * @magentoDataFixture Magento/Review/_files/different_reviews.php
+     * @magentoAppArea frontend
+     */
+    public function testGetReviewSummaryHtml()
+    {
+        $productSku = 'simple';
+        $objectManager = \Magento\TestFramework\Helper\Bootstrap::getObjectManager();
+        /** @var \Magento\Catalog\Api\ProductRepositoryInterface $productRepository */
+        $productRepository = $objectManager->create(\Magento\Catalog\Api\ProductRepositoryInterface::class);
+        $product = $productRepository->get($productSku);
+        /** @var  \Magento\Review\Block\Product\ReviewRenderer $reviewRenderer */
+        $reviewRenderer = $objectManager->create(\Magento\Review\Block\Product\ReviewRenderer::class);
+        $actualResult = $reviewRenderer->getReviewsSummaryHtml($product);
+        $this->assertEquals(2, $reviewRenderer->getReviewsCount());
+        $this->assertNotEmpty($actualResult);
+    }
+}

dev/tests/integration/testsuite/Magento/Review/_files/different_reviews.php

@@ -71,3 +71,4 @@
         )->getStore()->getId()
     ]
 )->save();
+$review->aggregate();