Remove Zend_Json usage from the minicart.phtml template

Author: dmanners

app/code/Magento/Checkout/Block/Cart/Sidebar.php

@@ -27,6 +27,11 @@ class Sidebar extends AbstractCart
      */
     protected $imageHelper;
 
+    /**
+     * @var \Magento\Framework\Serialize\SerializerInterface
+     */
+    private $serializer;
+
     /**
      * @param \Magento\Framework\View\Element\Template\Context $context
      * @param \Magento\Customer\Model\Session $customerSession
@@ -42,6 +47,7 @@ public function __construct(
         \Magento\Checkout\Model\Session $checkoutSession,
         \Magento\Catalog\Helper\Image $imageHelper,
         \Magento\Customer\CustomerData\JsLayoutDataProviderPoolInterface $jsLayoutDataProvider,
+        \Magento\Framework\Serialize\SerializerInterface $serializer = null,
         array $data = []
     ) {
         if (isset($data['jsLayout'])) {
@@ -53,6 +59,8 @@ public function __construct(
         parent::__construct($context, $customerSession, $checkoutSession, $data);
         $this->_isScopePrivate = false;
         $this->imageHelper = $imageHelper;
+        $this->serializer = $serializer ?: \Magento\Framework\App\ObjectManager::getInstance()
+            ->get(\Magento\Framework\Serialize\SerializerInterface::class);
     }
 
     /**
@@ -74,6 +82,14 @@ public function getConfig()
         ];
     }
 
+    /**
+     * @return string
+     */
+    public function getSerializedConfig()
+    {
+        return $this->serializer->serialize($this->getConfig());
+    }
+
     /**
      * @return string
      */

app/code/Magento/Checkout/Test/Unit/Block/Cart/SidebarTest.php

@@ -53,6 +53,11 @@ class SidebarTest extends \PHPUnit_Framework_TestCase
      */
     protected $requestMock;
 
+    /**
+     * @var \PHPUnit_Framework_MockObject_MockObject
+     */
+    private $serializer;
+
     protected function setUp()
     {
         $this->_objectManager = new \Magento\Framework\TestFramework\Unit\Helper\ObjectManager($this);
@@ -94,12 +99,15 @@ protected function setUp()
             ->method('getRequest')
             ->will($this->returnValue($this->requestMock));
 
+        $this->serializer = $this->getMock(\Magento\Framework\Serialize\SerializerInterface::class,[],[],'',false);
+
         $this->model = $this->_objectManager->getObject(
             \Magento\Checkout\Block\Cart\Sidebar::class,
             [
                 'context' => $contextMock,
                 'imageHelper' => $this->imageHelper,
-                'checkoutSession' => $this->checkoutSessionMock
+                'checkoutSession' => $this->checkoutSessionMock,
+                'serializer' => $this->serializer
             ]
         );
     }

app/code/Magento/Checkout/view/frontend/templates/cart/minicart.phtml

@@ -43,7 +43,7 @@
         </div>
     <?php endif ?>
     <script>
-        window.checkout = <?php /* @escapeNotVerified */ echo \Zend_Json::encode($block->getConfig()); ?>;
+        window.checkout = <?php /* @escapeNotVerified */ echo $block->getSerializedConfig(); ?>;
     </script>
     <script type="text/x-magento-init">
     {