Issue #2974156 by MegaChriz, k4v, John.nie, jian he, darrenwh, jurgenhaas,...

  // File references that existed both in the previous version of the revision

  // and in the new one don't need their usage to be updated.

  else {

    $original_uuids_by_field = _editor_get_file_uuids_by_field($entity->original);

    $original_uuids_by_field = empty($entity->original) ? [] :

      _editor_get_file_uuids_by_field($entity->original);

    $uuids_by_field = _editor_get_file_uuids_by_field($entity);

    // Detect file usages that should be incremented.

    foreach ($uuids_by_field as $field => $uuids) {

      $added_files = array_diff($uuids_by_field[$field], $original_uuids_by_field[$field]);

      $original_uuids = isset($original_uuids_by_field[$field]) ?

        $original_uuids_by_field[$field] : [];

      if ($added_files = array_diff($uuids_by_field[$field], $original_uuids)) {

        _editor_record_file_usage($added_files, $entity);

      }

    }

    // Detect file usages that should be decremented.

    foreach ($original_uuids_by_field as $field => $uuids) {

 * Helper module for the Text Editor tests.

 */

use Drupal\Core\Entity\EntityInterface;

use Drupal\node\NodeInterface;

use Drupal\filter\FilterFormatInterface;

use Drupal\file\FileInterface;

/**

 * Implements hook_entity_update().

 *

 * @see \Drupal\Tests\editor\Kernel\EntityUpdateTest

 */

function editor_test_entity_update(EntityInterface $entity) {

  // Only act on nodes.

  if (!$entity instanceof NodeInterface) {

    return;

  }

  // Avoid infinite loop by only going through our post save logic once.

  if (!empty($entity->editor_test_updating)) {

    return;

  }

  // Set flag for whether or not the entity needs to be resaved.

  $needs_update = FALSE;

  // Perform our post save logic.

  if ($entity->title->value == 'test updated') {

    // Change the node title.

    $entity->title->value = 'test updated 2';

    $needs_update = TRUE;

  }

  if ($needs_update) {

    // Set flag on entity that our logic was already executed.

    $entity->editor_test_updating = TRUE;

    // And resave entity.

    $entity->save();

  }

}

/**

 * Implements hook_editor_js_settings_alter().

 */

<?php

namespace Drupal\Tests\editor\Kernel;

use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;

use Drupal\node\Entity\NodeType;

use Drupal\node\Entity\Node;

/**

 * Tests updating an entity.

 *

 * @group editor

 */

class EntityUpdateTest extends EntityKernelTestBase {

  /**

   * Modules to enable.

   *

   * @var array

   */

  protected static $modules = ['editor', 'editor_test', 'node'];

  /**

   * {@inheritdoc}

   */

  protected function setUp(): void {

    parent::setUp();

    $this->installSchema('node', ['node_access']);

    $this->installConfig(['node']);

    // Create a node type for testing.

    $type = NodeType::create(['type' => 'page', 'name' => 'page']);

    $type->save();

    // Set editor_test module weight to be lower than editor module's weight so

    // that editor_test_entity_update() is called before editor_entity_update().

    $extension_config = \Drupal::configFactory()->get('core.extension');

    $editor_module_weight = $extension_config->get('module.editor');

    module_set_weight('editor_test', $editor_module_weight - 1);

  }

  /**

   * Tests updating an existing entity.

   *

   * @see editor_test_entity_update()

   */

  public function testEntityUpdate() {

    // Create a node.

    $node = Node::create([

      'type' => 'page',

      'title' => 'test',

    ]);

    $node->save();

    // Update the node.

    // What happens is the following:

    // 1. \Drupal\Core\Entity\EntityStorageBase::doPostSave() gets called.

    // 2. editor_test_entity_update() gets called.

    // 3. A resave of the updated entity gets triggered (second save call).

    // 4. \Drupal\Core\Entity\EntityStorageBase::doPostSave() gets called.

    // 5. editor_test_entity_update() gets called.

    // 6. editor_entity_update() gets called (caused by the second save call).

    // 7. editor_entity_update() gets called (caused by the first save call).

    $node->title->value = 'test updated';

    $node->save();

  }

}