baidu_tongji-8.x-1.x-dev/tests/modules/baidu_analytics_test/baidu_analytics_test.module

<?php

/**
 * @file
 * Provides hook implementations for testing the Baidu Analytics module.
 */

/**
 * Implements hook_page_attachments().
 *
 * Programmatically set Messages to test resulting generated tracking code.
 */
function baidu_analytics_test_page_attachments(&$page) {
  // Programmatically trigger all Messages: status, error and warning.
  \Drupal::messenger()->addStatus(t('Baidu Analytics Test status message.'));
  \Drupal::messenger()->addWarning(t('Baidu Analytics Test warning message.'));
  \Drupal::messenger()->addError(t('Baidu Analytics Test error message.'));
  \Drupal::messenger()->addError(t('Baidu Analytics Test error <em>message</em> with html tags and <a href="http://example.com/">link</a>.'));
}