Replace ZF1 Zend_Feed with ZF2/3 Zend\Feed

app/code/Magento/Rss/Model/Rss.php

@@ -8,6 +8,7 @@
 use Magento\Framework\App\ObjectManager;
 use Magento\Framework\App\Rss\DataProviderInterface;
 use Magento\Framework\Serialize\SerializerInterface;
+use Zend\Feed\Writer\FeedFactory;
 
 /**
  * Provides functionality to work with RSS feeds
@@ -92,7 +93,7 @@ public function setDataProvider(DataProviderInterface $dataProvider)
      */
     public function createRssXml()
     {
-        $rssFeedFromArray = \Zend_Feed::importArray($this->getFeeds(), 'rss');
-        return $rssFeedFromArray->saveXML();
+        $feed = FeedFactory::factory($this->getFeeds());
+        return $feed->export('rss');
     }
 }

app/code/Magento/Rss/Test/Unit/Controller/Adminhtml/Feed/IndexTest.php

@@ -6,6 +6,7 @@
 namespace Magento\Rss\Test\Unit\Controller\Adminhtml\Feed;
 
 use Magento\Framework\TestFramework\Unit\Helper\ObjectManager as ObjectManagerHelper;
+use Zend\Feed\Writer\Exception\InvalidArgumentException;
 
 /**
  * Class IndexTest
@@ -110,7 +111,7 @@ public function testExecuteWithException()
         $this->rssFactory->expects($this->once())->method('create')->will($this->returnValue($rssModel));
         $this->rssManager->expects($this->once())->method('getProvider')->will($this->returnValue($dataProvider));
 
-        $this->expectException('\Zend_Feed_Builder_Exception');
+        $this->expectException(InvalidArgumentException::class);
         $this->controller->execute();
     }
 }

app/code/Magento/Rss/Test/Unit/Controller/Feed/IndexTest.php

@@ -6,6 +6,7 @@
 namespace Magento\Rss\Test\Unit\Controller\Feed;
 
 use Magento\Framework\TestFramework\Unit\Helper\ObjectManager as ObjectManagerHelper;
+use Zend\Feed\Writer\Exception\InvalidArgumentException;
 
 /**
  * Class IndexTest
@@ -97,7 +98,7 @@ public function testExecuteWithException()
         $this->rssFactory->expects($this->once())->method('create')->will($this->returnValue($rssModel));
         $this->rssManager->expects($this->once())->method('getProvider')->will($this->returnValue($dataProvider));
 
-        $this->expectException('\Zend_Feed_Builder_Exception');
+        $this->expectException(InvalidArgumentException::class);
         $this->controller->execute();
     }
 }

app/code/Magento/Rss/Test/Unit/Model/RssTest.php

@@ -119,11 +119,11 @@ public function testCreateRssXml()
         $this->rss->setDataProvider($dataProvider);
         $result = $this->rss->createRssXml();
         $this->assertContains('<?xml version="1.0" encoding="UTF-8"?>', $result);
-        $this->assertContains('<title><![CDATA[Feed Title]]></title>', $result);
-        $this->assertContains('<title><![CDATA[Feed 1 Title]]></title>', $result);
+        $this->assertContains('<title>Feed Title</title>', $result);
+        $this->assertContains('<title>Feed 1 Title</title>', $result);
         $this->assertContains('<link>http://magento.com/rss/link</link>', $result);
         $this->assertContains('<link>http://magento.com/rss/link/id/1</link>', $result);
-        $this->assertContains('<description><![CDATA[Feed Description]]></description>', $result);
+        $this->assertContains('<description>Feed Description</description>', $result);
         $this->assertContains('<description><![CDATA[Feed 1 Description]]></description>', $result);
     }
 }

composer.json

@@ -59,6 +59,7 @@
         "zendframework/zend-db": "^2.8.2",
         "zendframework/zend-di": "^2.6.1",
         "zendframework/zend-eventmanager": "^2.6.3",
+        "zendframework/zend-feed": "^2.9.0",
         "zendframework/zend-form": "^2.10.0",
         "zendframework/zend-http": "^2.6.0",
         "zendframework/zend-i18n": "^2.7.3",

dev/tests/static/testsuite/Magento/Test/Legacy/_files/obsolete_classes.php

@@ -4220,4 +4220,5 @@
     ['Magento\Framework\MessageQueue\Config\Reader', 'Magento\Framework\MessageQueue\Config\Reader\Xml'],
     ['Magento\Framework\MessageQueue\PublisherFactory'],
     ['Magento\Framework\MessageQueue\PublisherProxy'],
+    ['Zend_Feed', 'Zend\Feed'],
 ];