SortableTestTrait.php

<?php

namespace Drupal\FunctionalJavascriptTests;


/**
 * Provides functions for simulating sort changes.
 *
 * Selenium uses ChromeDriver for FunctionalJavascript tests, but it does not
 * currently support HTML5 drag and drop. These methods manipulate the DOM.
 * This trait should be deprecated when the Chromium bug is fixed.
 *
 * @see https://www.drupal.org/project/drupal/issues/3078152
 */
trait SortableTestTrait {
    
    /**
     * Define to provide any necessary callback following layout change.
     *
     * @param string $item
     *   The HTML selector for the element to be moved.
     * @param string $from
     *   The HTML selector for the previous container element.
     * @param null|string $to
     *   The HTML selector for the target container.
     */
    protected abstract function sortableUpdate($item, $from, $to = NULL);
    
    /**
     * Simulates a drag on an element from one container to another.
     *
     * @param string $item
     *   The HTML selector for the element to be moved.
     * @param string $from
     *   The HTML selector for the previous container element.
     * @param null|string $to
     *   The HTML selector for the target container.
     */
    protected function sortableTo($item, $from, $to) {
        $item = addslashes($item);
        $from = addslashes($from);
        $to = addslashes($to);
        $script = <<<JS
(function (src, to) {
  var sourceElement = document.querySelector(src);
  var toElement = document.querySelector(to);

  toElement.insertBefore(sourceElement, toElement.firstChild);
})('{<span class="php-variable">$item</span>}', '{<span class="php-variable">$to</span>}')

JS;
        $options = [
            'script' => $script,
            'args' => [],
        ];
        $this->getSession()
            ->getDriver()
            ->getWebDriverSession()
            ->execute($options);
        $this->sortableUpdate($item, $from, $to);
    }
    
    /**
     * Simulates a drag moving an element after its sibling in the same container.
     *
     * @param string $item
     *   The HTML selector for the element to be moved.
     * @param string $target
     *   The HTML selector for the sibling element.
     * @param string $from
     *   The HTML selector for the element container.
     */
    protected function sortableAfter($item, $target, $from) {
        $item = addslashes($item);
        $target = addslashes($target);
        $from = addslashes($from);
        $script = <<<JS
(function (src, to) {
  var sourceElement = document.querySelector(src);
  var toElement = document.querySelector(to);

  toElement.insertAdjacentElement('afterend', sourceElement);
})('{<span class="php-variable">$item</span>}', '{<span class="php-variable">$target</span>}')

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

}