StyleTestBase.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\views\Kernel\Plugin;

use Drupal\Component\Utility\Html;
use Drupal\Tests\views\Kernel\ViewsKernelTestBase;

/**
 * Tests some general style plugin related functionality.
 */
abstract class StyleTestBase extends ViewsKernelTestBase {
    
    /**
     * Stores the SimpleXML representation of the output.
     *
     * @var \SimpleXMLElement
     */
    protected $elements;
    
    /**
     * Stores a view output in the elements.
     */
    public function storeViewPreview($output) {
        $htmlDom = Html::load($output);
        if ($htmlDom) {
            // It's much easier to work with simplexml than DOM, luckily enough
            // we can just simply import our DOM tree.
            $this->elements = simplexml_import_dom($htmlDom);
        }
    }

}