Update to Drupal 8.1.0. For more information, see https://www.drupal.org/drupal-8.1.0-release-notes

core/modules/help/tests/src/Kernel/HelpEmptyPageTest.php

@@ -0,0 +1,52 @@
+<?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}
+   */
+  public static $modules = ['system', 'help_test', 'user'];
+
+  /**
+   * {@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 = system_rebuild_module_data();
+    $all_modules = array_filter($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)]);
+  }
+
+}