DefaultMetatagsTest.php

<?php

namespace Drupal\Tests\system\Functional\Page;

use Drupal\Tests\BrowserTestBase;

/**
 * Tests default HTML metatags on a page.
 *
 * @group Page
 */
class DefaultMetatagsTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests meta tags.
     */
    public function testMetaTag() {
        $this->drupalGet('');
        // Ensures that the charset metatag is on the page.
        $result = $this->xpath('//meta[@charset="utf-8"]');
        $this->assertCount(1, $result);
        // Ensure that the charset one is the first metatag.
        $result = $this->xpath('//meta');
        $this->assertEqual((string) $result[0]->getAttribute('charset'), 'utf-8');
        // Ensure that the shortcut icon is on the page.
        $result = $this->xpath('//link[@rel = "shortcut icon"]');
        $this->assertCount(1, $result, 'The shortcut icon is present.');
    }

}