Remove "Add Review" if System has no Product issue24310

app/code/Magento/Review/Block/Adminhtml/Main.php

@@ -3,12 +3,19 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
 
 /**
  * Adminhtml review main block
  */
 namespace Magento\Review\Block\Adminhtml;
 
+use Magento\Framework\App\ObjectManager;
+use Magento\Catalog\Model\ResourceModel\Product\CollectionFactory as ProductCollectionFactory;
+
+/**
+ * Class \Magento\Review\Block\Adminhtml\Main
+ */
 class Main extends \Magento\Backend\Block\Widget\Grid\Container
 {
     /**
@@ -37,26 +44,37 @@ class Main extends \Magento\Backend\Block\Widget\Grid\Container
      */
     protected $_customerViewHelper;
 
+    /**
+     * Product Collection
+     *
+     * @var ProductCollectionFactory
+     */
+    private $productCollectionFactory;
+
     /**
      * @param \Magento\Backend\Block\Widget\Context $context
      * @param \Magento\Customer\Api\CustomerRepositoryInterface $customerRepository
      * @param \Magento\Catalog\Model\ProductFactory $productFactory
      * @param \Magento\Framework\Registry $registry
      * @param \Magento\Customer\Helper\View $customerViewHelper
      * @param array $data
+     * @param ProductCollectionFactory $productCollectionFactory
      */
     public function __construct(
         \Magento\Backend\Block\Widget\Context $context,
         \Magento\Customer\Api\CustomerRepositoryInterface $customerRepository,
         \Magento\Catalog\Model\ProductFactory $productFactory,
         \Magento\Framework\Registry $registry,
         \Magento\Customer\Helper\View $customerViewHelper,
-        array $data = []
+        array $data = [],
+        ProductCollectionFactory $productCollectionFactory = null
     ) {
         $this->_coreRegistry = $registry;
         $this->customerRepository = $customerRepository;
         $this->_productFactory = $productFactory;
         $this->_customerViewHelper = $customerViewHelper;
+        $this->productCollectionFactory = $productCollectionFactory ?: ObjectManager::getInstance()
+            ->get(ProductCollectionFactory::class);
         parent::__construct($context, $data);
     }
 
@@ -73,6 +91,10 @@ protected function _construct()
         $this->_blockGroup = 'Magento_Review';
         $this->_controller = 'adminhtml';
 
+        if (!$this->productCollectionFactory->create()->getSize()) {
+            $this->removeButton('add');
+        }
+
         // lookup customer, if id is specified
         $customerId = $this->getRequest()->getParam('customerId', false);
         $customerName = '';

app/code/Magento/Review/Test/Unit/Block/Adminhtml/MainTest.php

@@ -3,39 +3,59 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
 
 namespace Magento\Review\Test\Unit\Block\Adminhtml;
 
 use Magento\Framework\TestFramework\Unit\Helper\ObjectManager as ObjectManagerHelper;
+use Magento\Customer\Api\CustomerRepositoryInterface;
+use Magento\Customer\Helper\View as ViewHelper;
+use Magento\Customer\Api\Data\CustomerInterface;
+use Magento\Framework\App\RequestInterface;
+use Magento\Review\Block\Adminhtml\Main as MainBlock;
+use Magento\Framework\DataObject;
+use Magento\Catalog\Model\ResourceModel\Product\Collection;
+use Magento\Catalog\Model\ResourceModel\Product\CollectionFactory;
 
+/**
+ * Unit Test For Main Block
+ *
+ * Class \Magento\Review\Test\Unit\Block\Adminhtml\MainTest
+ */
 class MainTest extends \PHPUnit\Framework\TestCase
 {
     /**
-     * @var \Magento\Review\Block\Adminhtml\Main
+     * @var MainBlock
      */
     protected $model;
 
     /**
-     * @var \Magento\Framework\App\RequestInterface|\PHPUnit_Framework_MockObject_MockObject
+     * @var RequestInterface|\PHPUnit_Framework_MockObject_MockObject
      */
     protected $request;
 
     /**
-     * @var \Magento\Customer\Api\CustomerRepositoryInterface|\PHPUnit_Framework_MockObject_MockObject
+     * @var CustomerRepositoryInterface|\PHPUnit_Framework_MockObject_MockObject
      */
     protected $customerRepository;
 
     /**
-     * @var \Magento\Customer\Helper\View|\PHPUnit_Framework_MockObject_MockObject
+     * @var ViewHelper|\PHPUnit_Framework_MockObject_MockObject
      */
     protected $customerViewHelper;
 
+    /**
+     * @var CollectionFactory|\PHPUnit_Framework_MockObject_MockObject
+     */
+    protected $collectionFactory;
+
     public function testConstruct()
     {
         $this->customerRepository = $this
-            ->getMockForAbstractClass(\Magento\Customer\Api\CustomerRepositoryInterface::class);
-        $this->customerViewHelper = $this->createMock(\Magento\Customer\Helper\View::class);
-        $dummyCustomer = $this->getMockForAbstractClass(\Magento\Customer\Api\Data\CustomerInterface::class);
+            ->getMockForAbstractClass(CustomerRepositoryInterface::class);
+        $this->customerViewHelper = $this->createMock(ViewHelper::class);
+        $this->collectionFactory = $this->createMock(CollectionFactory::class);
+        $dummyCustomer = $this->getMockForAbstractClass(CustomerInterface::class);
 
         $this->customerRepository->expects($this->once())
             ->method('getById')
@@ -44,8 +64,8 @@ public function testConstruct()
         $this->customerViewHelper->expects($this->once())
             ->method('getCustomerName')
             ->with($dummyCustomer)
-            ->will($this->returnValue(new \Magento\Framework\DataObject()));
-        $this->request = $this->getMockForAbstractClass(\Magento\Framework\App\RequestInterface::class);
+            ->will($this->returnValue(new DataObject()));
+        $this->request = $this->getMockForAbstractClass(RequestInterface::class);
         $this->request->expects($this->at(0))
             ->method('getParam')
             ->with('customerId', false)
@@ -54,14 +74,21 @@ public function testConstruct()
             ->method('getParam')
             ->with('productId', false)
             ->will($this->returnValue(false));
+        $productCollection = $this->getMockBuilder(Collection::class)
+            ->disableOriginalConstructor()
+            ->getMock();
+        $this->collectionFactory->expects($this->once())
+            ->method('create')
+            ->will($this->returnValue($productCollection));
 
         $objectManagerHelper = new ObjectManagerHelper($this);
         $this->model = $objectManagerHelper->getObject(
-            \Magento\Review\Block\Adminhtml\Main::class,
+            MainBlock::class,
             [
                 'request' => $this->request,
                 'customerRepository' => $this->customerRepository,
-                'customerViewHelper' => $this->customerViewHelper
+                'customerViewHelper' => $this->customerViewHelper,
+                'productCollectionFactory' => $this->collectionFactory
             ]
         );
     }