NoJavaScriptAnonymousTest.php

<?php

namespace Drupal\Tests\system\Functional\Common;

use Drupal\node\NodeInterface;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests that anonymous users are not served any JavaScript.
 *
 * This is tested with the core modules that are enabled in the 'standard'
 * profile.
 *
 * @group Common
 */
class NoJavaScriptAnonymousTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected $profile = 'standard';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        // Grant the anonymous user the permission to look at user profiles.
        user_role_grant_permissions('anonymous', [
            'access user profiles',
        ]);
    }
    
    /**
     * Tests that anonymous users are not served any JavaScript.
     */
    public function testNoJavaScript() {
        // Create a node of content type 'article' that is listed on the frontpage.
        $this->drupalCreateNode([
            'type' => 'article',
            'promote' => NodeInterface::PROMOTED,
        ]);
        // Test frontpage.
        $this->drupalGet('');
        $this->assertNoJavaScript();
        // Test node page.
        $this->drupalGet('node/1');
        $this->assertNoJavaScript();
        // Test user profile page.
        $user = $this->drupalCreateUser();
        $this->drupalGet('user/' . $user->id());
        $this->assertNoJavaScript();
    }
    
    /**
     * Passes if no JavaScript is found on the page.
     *
     * @internal
     */
    protected function assertNoJavaScript() : void {
        // Ensure drupalSettings is not set.
        $settings = $this->getDrupalSettings();
        $this->assertEmpty($settings, 'drupalSettings is not set.');
        $this->assertSession()
            ->responseNotMatches('/\\.js/');
    }

}