html_title-8.x-1.x-dev/tests/modules/html_title_test/html_title_test.module

<?php

/**
 * @file
 * Support module for the HTML Title module tests.
 */

use Drupal\Core\Breadcrumb\Breadcrumb;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Link;
use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_system_breadcrumb_alter().
 */
function html_title_test_system_breadcrumb_alter(Breadcrumb $breadcrumb, RouteMatchInterface $route_match, array $context) {
  // Append the current page title to the breadcrumb for non-admin routes.
  if (!\Drupal::service('router.admin_context')->isAdminRoute()) {
    $title = \Drupal::service('title_resolver')->getTitle(\Drupal::request(), $route_match->getRouteObject());
    if (!empty($title)) {
      $breadcrumb->addLink(Link::createFromRoute($title, '<none>'));
      $breadcrumb->addCacheContexts(['url.path']);
    }
  }
}

/**
 * Implements hook_form_FORM_ID_alter().
 */
function html_title_test_form_node_form_alter(array &$form, FormStateInterface $form_state, string $form_id) {
  $form['actions']['submit']['#submit'][] = '_html_title_test_add_status_message';
}

/**
 * Add extra status messages after a node is saved.
 *
 * This makes it possible to test that only the node confirmation messages are
 * overridden.
 */
function _html_title_test_add_status_message(array &$form, FormStateInterface $form_state) {
  if (\Drupal::state()->get('html_title_test.set_node_confirmation_messages', FALSE)) {
    \Drupal::messenger()->addStatus('Test status message');
    \Drupal::messenger()->addStatus('Test status message with <p>HTML</p>');
    \Drupal::messenger()->addError('Test error message');
  }
}