LayoutBuilderSortTrait.php

<?php

namespace Drupal\Tests\layout_builder\FunctionalJavascript;

use Drupal\FunctionalJavascriptTests\SortableTestTrait;

/**
 * LayoutBuilderSortTrait, provides callback for simulated layout change.
 */
trait LayoutBuilderSortTrait {
  use SortableTestTrait;
  
  /**
   * {@inheritdoc}
   */
  protected function sortableUpdate($item, $from, $to = NULL) {
    // If container does not change, $from and $to are equal.
    $to = $to ?: $from;
    $script = <<<JS
(function (src, from, to) {
  var sourceElement = document.querySelector(src);
  var fromElement = document.querySelector(from);
  var toElement = document.querySelector(to);

  Drupal.layoutBuilderBlockUpdate(sourceElement, fromElement, toElement)

})('{<span class="php-variable">$item</span>}', '{<span class="php-variable">$from</span>}', '{<span class="php-variable">$to</span>}')

JS;
    $options = [
      'script' => $script,
      'args' => [],
    ];
    $this->getSession()
      ->getDriver()
      ->getWebDriverSession()
      ->execute($options);
  }

}