MAGETWO-66064: Remove usages of unserialize in module Magento/Catalog

Author: slopukhov

dev/tests/integration/testsuite/Magento/Catalog/Block/Product/NewTest.php

@@ -115,4 +115,25 @@ public function testToHtml()
             $this->_block->getProductCollection()
         );
     }
+
+    /**
+     * @covers \Magento\Catalog\Block\Product\Widget\NewWidget::getCacheKeyInfo
+     */
+    public function testNewWidgetGetCacheKeyInfo()
+    {
+        $block = \Magento\TestFramework\Helper\Bootstrap::getObjectManager()->get(
+            \Magento\Framework\View\LayoutInterface::class
+        )->createBlock(
+            \Magento\Catalog\Block\Product\Widget\NewWidget::class
+        );
+
+        $requestParams = ['test' => 'data'];
+
+        $block->getRequest()->setParams($requestParams);
+
+        $info = $block->getCacheKeyInfo();
+
+        $this->assertEquals('CATALOG_PRODUCT_NEW', $info[0]);
+        $this->assertEquals(json_encode($requestParams), $info[8]);
+    }
 }