HelpEmptyPageTest.php

<?php

namespace Drupal\Tests\help\Kernel;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\Routing\RouteMatch;
use Drupal\help_test\SupernovaGenerator;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the empty HTML page.
 *
 * @group help
 */
class HelpEmptyPageTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'help_test',
        'user',
        'path_alias',
    ];
    
    /**
     * {@inheritdoc}
     */
    public function register(ContainerBuilder $container) {
        parent::register($container);
        $container->set('url_generator', new SupernovaGenerator());
    }
    
    /**
     * Ensures that no URL generator is called on a page without hook_help().
     */
    public function testEmptyHookHelp() {
        $all_modules = \Drupal::service('extension.list.module')->getList();
        $all_modules = array_filter($all_modules, function ($module) {
            // Filter contrib, hidden, already enabled modules and modules in the
            // Testing package.
            if ($module->origin !== 'core' || !empty($module->info['hidden']) || $module->status == TRUE || $module->info['package'] == 'Testing') {
                return FALSE;
            }
            return TRUE;
        });
        $this->enableModules(array_keys($all_modules));
        $this->installEntitySchema('menu_link_content');
        $route = \Drupal::service('router.route_provider')->getRouteByName('<front>');
        \Drupal::service('module_handler')->invokeAll('help', [
            '<front>',
            new RouteMatch('<front>', $route),
        ]);
    }

}