Add 'metatitle' to metadata test

Author: slackerzz

lib/internal/Magento/Framework/View/Page/Config.php

@@ -127,6 +127,7 @@ class Config
         'description' => null,
         'keywords' => null,
         'robots' => null,
+        'title' => null,
     ];
 
     /**

lib/internal/Magento/Framework/View/Test/Unit/Page/ConfigTest.php

@@ -141,8 +141,10 @@ public function testMetadata()
             'robots' => null,
             'name' => 'test_value',
             'html_encoded' => '<title><span class="test">Test</span></title>',
+            'title' => 'metatitle'
         ];
         $this->model->setMetadata('name', 'test_value');
+        $this->model->setMetadata('title', 'metatitle');
         $this->model->setMetadata('html_encoded', '<title><span class="test">Test</span></title>');
         $this->assertEquals($expectedMetadata, $this->model->getMetadata());
     }