class DisplayFeedTest

class DisplayFeedTest extends ViewTestBase {
    use PathAliasTestTrait;
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_display_feed',
        'test_attached_disabled',
        'test_feed_icon',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'block',
        'node',
        'views',
        'views_test_rss',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'starterkit_theme';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE, $modules = [
        'views_test_config',
    ]) : void {
        parent::setUp($import_test_views, $modules);
        $this->enableViewsTestModule();
        $admin_user = $this->drupalCreateUser([
            'administer site configuration',
        ]);
        $this->drupalLogin($admin_user);
    }
    
    /**
     * Tests the rendered output.
     */
    public function testFeedOutput() : void {
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        // Verify a title with HTML entities is properly escaped.
        $node_title = 'This "cool" & "neat" article\'s title';
        $node = $this->drupalCreateNode([
            'title' => $node_title,
            'body' => [
                0 => [
                    'value' => 'A paragraph',
                    'format' => filter_default_format(),
                ],
            ],
        ]);
        $node_link = $node->toUrl()
            ->setAbsolute()
            ->toString();
        // Test the site name setting.
        $site_name = $this->randomMachineName();
        $frontpage_url = Url::fromRoute('<front>')->setAbsolute()
            ->toString();
        $this->config('system.site')
            ->set('name', $site_name)
            ->save();
        $this->drupalGet('test-feed-display.xml');
        $this->assertEquals($site_name, $this->getSession()
            ->getDriver()
            ->getText('//channel/title'));
        $this->assertEquals($frontpage_url, $this->getSession()
            ->getDriver()
            ->getText('//channel/link'));
        $this->assertEquals('Copyright 2019 Dries Buytaert', $this->getSession()
            ->getDriver()
            ->getText('//channel/copyright'));
        $this->assertEquals($node_title, $this->getSession()
            ->getDriver()
            ->getText('//item/title'));
        $this->assertEquals($node_link, $this->getSession()
            ->getDriver()
            ->getText('//item/link'));
        // HTML should no longer be escaped since it is CDATA. Confirm it is
        // wrapped in CDATA.
        $this->assertSession()
            ->responseContains('<description><![CDATA[');
        // Confirm that the view is still displaying the content.
        $this->assertSession()
            ->responseContains('<p>A paragraph</p>');
        // Confirm that the CDATA is closed properly.
        $this->assertSession()
            ->responseContains(']]></description>');
        $view = $this->container
            ->get('entity_type.manager')
            ->getStorage('view')
            ->load('test_display_feed');
        $display =& $view->getDisplay('feed_1');
        $display['display_options']['sitename_title'] = 0;
        $view->save();
        $this->drupalGet('test-feed-display.xml');
        $this->assertEquals('test_display_feed', $this->getSession()
            ->getDriver()
            ->getText('//channel/title'));
        // Add a block display and attach the feed.
        $view->getExecutable()
            ->newDisplay('block', NULL, 'test');
        $display =& $view->getDisplay('feed_1');
        $display['display_options']['displays']['test'] = 'test';
        $view->save();
        // Test the feed display adds a feed icon to the block display.
        $this->drupalPlaceBlock('views_block:test_display_feed-test');
        $this->drupalGet('<front>');
        $feed_icon = $this->cssSelect('div.view-id-test_display_feed a.feed-icon');
        $this->assertStringContainsString('test-feed-display.xml', $feed_icon[0]->getAttribute('href'), 'The feed icon was found.');
        // Test feed display attached to page display with arguments.
        $this->drupalGet('test-feed-icon/' . $node->id());
        $page_url = $this->getUrl();
        $icon_href = $this->cssSelect('a.feed-icon[href *= "test-feed-icon"]')[0]
            ->getAttribute('href');
        $this->assertEquals($page_url . '/feed', $icon_href, 'The feed icon was found.');
        $link_href = $this->cssSelect('link[type = "application/rss+xml"][href *= "test-feed-icon"]')[0]
            ->getAttribute('href');
        $this->assertEquals($page_url . '/feed', $link_href, 'The RSS link was found.');
        $this->drupalGet($icon_href);
        $this->assertEquals($frontpage_url, $this->getSession()
            ->getDriver()
            ->getText('//channel/link'));
    }
    
    /**
     * Tests the rendered output for fields display.
     */
    public function testFeedFieldOutput() : void {
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        // Verify a title with HTML entities is properly escaped.
        $node_title = 'This "cool" & "neat" article\'s title';
        $node = $this->drupalCreateNode([
            'title' => $node_title,
            'body' => [
                0 => [
                    'value' => 'A paragraph',
                    'format' => filter_default_format(),
                ],
            ],
        ]);
        // Create an alias to verify that outbound processing runs on the link and
        // ensure that the node actually contains that.
        $this->createPathAlias('/node/' . $node->id(), '/the-article-alias');
        $node_link = $node->toUrl()
            ->setAbsolute()
            ->toString();
        $this->assertStringContainsString('/the-article-alias', $node_link);
        $this->drupalGet('test-feed-display-fields.xml');
        $this->assertEquals($node_title, $this->getSession()
            ->getDriver()
            ->getText('//item/title'));
        $this->assertEquals($node_link, $this->getSession()
            ->getDriver()
            ->getText('//item/link'));
        // HTML should no longer be escaped since it is CDATA. Confirm it is wrapped
        // in CDATA.
        $this->assertSession()
            ->responseContains('<description><![CDATA[');
        // Confirm that the view is still displaying the content.
        $this->assertSession()
            ->responseContains('<p>A paragraph</p>');
        // Confirm that the CDATA is closed properly.
        $this->assertSession()
            ->responseContains(']]></description>');
        // Change the display to use the nid field, which is rewriting output as
        // 'node/{{ nid }}' and make sure things are still working.
        $view = Views::getView('test_display_feed');
        $display =& $view->storage
            ->getDisplay('feed_2');
        $display['display_options']['row']['options']['link_field'] = 'nid';
        $view->save();
        $this->drupalGet('test-feed-display-fields.xml');
        $this->assertEquals($node_title, $this->getSession()
            ->getDriver()
            ->getText('//item/title'));
        $this->assertEquals($node_link, $this->getSession()
            ->getDriver()
            ->getText('//item/link'));
    }
    
    /**
     * Tests that nothing is output when the feed display is disabled.
     */
    public function testDisabledFeed() : void {
        $this->drupalCreateContentType([
            'type' => 'page',
        ]);
        $this->drupalCreateNode();
        // Ensure that the feed_1 display is attached to the page_1 display.
        $view = Views::getView('test_attached_disabled');
        $view->setDisplay('page_1');
        $attached_displays = $view->display_handler
            ->getAttachedDisplays();
        $this->assertContains('feed_1', $attached_displays, 'The feed display is attached to the page display.');
        // Check that the rss header is output on the page display.
        $this->drupalGet('/test-attached-disabled');
        $this->assertSession()
            ->elementAttributeContains('xpath', '//link[@rel="alternate"]', 'type', 'application/rss+xml');
        $this->assertSession()
            ->elementAttributeContains('xpath', '//link[@rel="alternate"]', 'href', 'test-attached-disabled.xml');
        // Disable the feed display.
        $view->displayHandlers
            ->get('feed_1')
            ->setOption('enabled', FALSE);
        $view->save();
        // Ensure there is no link rel present on the page.
        $this->drupalGet('/test-attached-disabled');
        $this->assertSession()
            ->elementNotExists('xpath', '//link[@rel="alternate"]');
        // Ensure the feed attachment returns 'Not found'.
        $this->drupalGet('/test-attached-disabled.xml');
        $this->assertSession()
            ->statusCodeEquals(404);
    }
    
    /**
     * Tests that the feed display works when the linked display is disabled.
     */
    public function testDisabledLinkedDisplay() : void {
        $view = Views::getView('test_attached_disabled');
        $view->setDisplay();
        // Disable the page and link the feed to the page.
        $view->displayHandlers
            ->get('feed_1')
            ->setOption('link_display', 'page_1');
        $view->displayHandlers
            ->get('page_1')
            ->setOption('enabled', FALSE);
        $view->save();
        \Drupal::service('router.builder')->rebuild();
        $this->drupalGet('test-attached-disabled');
        $this->assertSession()
            ->statusCodeEquals(404);
        // Ensure the feed can still be reached.
        $this->drupalGet('test-attached-disabled.xml');
        $this->assertSession()
            ->statusCodeEquals(200);
    }
    
    /**
     * Tests the cacheability of the feed display.
     */
    public function testFeedCacheability() : void {
        // Test as an anonymous user.
        $this->drupalLogout();
        // Set the page cache max age to a value greater than zero.
        $config = $this->config('system.performance');
        $config->set('cache.page.max_age', 300);
        $config->save();
        // Uninstall all page cache modules that could cache the HTTP response
        // headers.
        \Drupal::service('module_installer')->uninstall([
            'page_cache',
            'dynamic_page_cache',
        ]);
        // Reset all so that the config and module changes are active.
        $this->resetAll();
        $url = 'test-feed-display.xml';
        $this->drupalGet($url);
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->responseHeaderEquals('Cache-Control', 'max-age=300, public');
        $this->assertSession()
            ->responseHeaderEquals('Content-Type', 'application/rss+xml; charset=utf-8');
        // Visit the page again to get the cached response.
        $this->drupalGet($url);
        $this->assertSession()
            ->responseHeaderEquals('Cache-Control', 'max-age=300, public');
        $this->assertSession()
            ->responseHeaderEquals('Content-Type', 'application/rss+xml; charset=utf-8');
    }

}