AddFeedTest.php

<?php

namespace Drupal\Tests\system\Kernel\Common;

use Drupal\Core\Url;
use Drupal\KernelTests\KernelTestBase;

/**
 * Make sure that attaching feeds works correctly with various constructs.
 *
 * @group Common
 */
class AddFeedTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
    ];
    
    /**
     * Tests attaching feeds with paths, URLs, and titles.
     */
    public function testBasicFeedAddNoTitle() {
        $path = $this->randomMachineName(12);
        $external_url = 'http://' . $this->randomMachineName(12) . '/' . $this->randomMachineName(12);
        $fully_qualified_local_url = Url::fromUri('base:' . $this->randomMachineName(12), [
            'absolute' => TRUE,
        ])
            ->toString();
        $path_for_title = $this->randomMachineName(12);
        $external_for_title = 'http://' . $this->randomMachineName(12) . '/' . $this->randomMachineName(12);
        $fully_qualified_for_title = Url::fromUri('base:' . $this->randomMachineName(12), [
            'absolute' => TRUE,
        ])
            ->toString();
        $urls = [
            'path without title' => [
                'url' => Url::fromUri('base:' . $path, [
                    'absolute' => TRUE,
                ])->toString(),
                'title' => '',
            ],
            'external URL without title' => [
                'url' => $external_url,
                'title' => '',
            ],
            'local URL without title' => [
                'url' => $fully_qualified_local_url,
                'title' => '',
            ],
            'path with title' => [
                'url' => Url::fromUri('base:' . $path_for_title, [
                    'absolute' => TRUE,
                ])->toString(),
                'title' => $this->randomMachineName(12),
            ],
            'external URL with title' => [
                'url' => $external_for_title,
                'title' => $this->randomMachineName(12),
            ],
            'local URL with title' => [
                'url' => $fully_qualified_for_title,
                'title' => $this->randomMachineName(12),
            ],
        ];
        $build = [];
        foreach ($urls as $feed_info) {
            $build['#attached']['feed'][] = [
                $feed_info['url'],
                $feed_info['title'],
            ];
        }
        // Use the bare HTML page renderer to render our links.
        $renderer = $this->container
            ->get('bare_html_page_renderer');
        $response = $renderer->renderBarePage($build, '', 'maintenance_page');
        // Glean the content from the response object.
        $this->setRawContent($response->getContent());
        // Assert that the content contains the RSS links we specified.
        foreach ($urls as $description => $feed_info) {
            $this->assertPattern($this->urlToRSSLinkPattern($feed_info['url'], $feed_info['title']));
        }
    }
    
    /**
     * Creates a pattern representing the RSS feed in the page.
     */
    public function urlToRSSLinkPattern($url, $title = '') {
        // Escape any regular expression characters in the URL ('?' is the worst).
        $url = preg_replace('/([+?.*])/', '[$0]', $url);
        $generated_pattern = '%<link +href="' . $url . '" +rel="alternate" +title="' . $title . '" +type="application/rss.xml" */>%';
        return $generated_pattern;
    }
    
    /**
     * Checks that special characters are correctly escaped.
     *
     * @see https://www.drupal.org/node/1211668
     */
    public function testFeedIconEscaping() {
        $variables = [
            '#theme' => 'feed_icon',
            '#url' => 'node',
            '#title' => '<>&"\'',
        ];
        $text = \Drupal::service('renderer')->renderRoot($variables);
        $this->assertEquals('Subscribe to &lt;&gt;&amp;&quot;&#039;', trim(strip_tags($text)), 'feed_icon template escapes reserved HTML characters.');
    }

}