book_test.module

<?php


/**
 * @file
 * Test module for testing the book module.
 *
 * This module's functionality depends on the following state variables:
 * - book_test.debug_book_navigation_cache_context: Used in NodeQueryAlterTest to enable the
 *   node_access_all grant realm.
 *
 * @see \Drupal\book\Tests\BookTest::testBookNavigationCacheContext()
 */

/**
 * Implements hook_page_attachments().
 */
function book_test_page_attachments(array &$page) {
    $page['#cache']['tags'][] = 'book_test.debug_book_navigation_cache_context';
    if (\Drupal::state()->get('book_test.debug_book_navigation_cache_context', FALSE)) {
        \Drupal::messenger()->addStatus(\Drupal::service('cache_contexts_manager')->convertTokensToKeys([
            'route.book_navigation',
        ])
            ->getKeys()[0]);
    }
}