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 in the Standard
 * installation profile.
 *
 * @group Common
 */
class NoJavaScriptAnonymousTest extends BrowserTestBase {
    protected $profile = 'standard';
    protected function setUp() {
        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 that is listed on the frontpage.
        $this->drupalCreateNode([
            'promote' => NodeInterface::PROMOTED,
        ]);
        $user = $this->drupalCreateUser();
        // Test frontpage.
        $this->drupalGet('');
        $this->assertNoJavaScriptExceptHtml5Shiv();
        // Test node page.
        $this->drupalGet('node/1');
        $this->assertNoJavaScriptExceptHtml5Shiv();
        // Test user profile page.
        $this->drupalGet('user/' . $user->id());
        $this->assertNoJavaScriptExceptHtml5Shiv();
    }
    
    /**
     * Passes if no JavaScript is found on the page except the HTML5 shiv.
     *
     * The HTML5 shiv is necessary for e.g. the <article> tag which Drupal 8 uses
     * to work in older browsers like Internet Explorer 8.
     */
    protected function assertNoJavaScriptExceptHtml5Shiv() {
        // Ensure drupalSettings is not set.
        $settings = $this->getDrupalSettings();
        $this->assertTrue(empty($settings), 'drupalSettings is not set.');
        // Ensure the HTML5 shiv exists.
        $this->assertRaw('html5shiv/html5shiv.min.js', 'HTML5 shiv JavaScript exists.');
        // Ensure no other JavaScript file exists on the page, while ignoring the
        // HTML5 shiv.
        $this->assertSession()
            ->responseNotMatches('/(?<!html5shiv\\.min)\\.js/');
    }

}