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),
    ]);
  }

}