FilterCaptionTwigDebugTest.php

<?php

namespace Drupal\Tests\filter\Kernel;

use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Core\Render\RenderContext;
use Drupal\filter\FilterPluginCollection;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the caption filter with Twig debugging on.
 *
 * @group filter
 */
class FilterCaptionTwigDebugTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'filter',
    ];
    
    /**
     * {@inheritdoc}
     */
    public function register(ContainerBuilder $container) {
        parent::register($container);
        // Enable Twig debugging.
        $parameters = $container->getParameter('twig.config');
        $parameters['debug'] = TRUE;
        $container->setParameter('twig.config', $parameters);
    }
    
    /**
     * Tests the caption filter with Twig debugging on.
     */
    public function testCaptionFilter() {
        $manager = $this->container
            ->get('plugin.manager.filter');
        $bag = new FilterPluginCollection($manager, []);
        $filter = $bag->get('filter_caption');
        $renderer = $this->container
            ->get('renderer');
        $test = function ($input) use ($filter, $renderer) {
            return $renderer->executeInRenderContext(new RenderContext(), function () use ($input, $filter) {
                return $filter->process($input, 'und');
            });
        };
        // No data-caption attribute.
        $input = '<img src="llama.jpg" />';
        $expected = $input;
        $this->assertEquals($expected, $test($input)->getProcessedText());
        // Data-caption attribute.
        $input = '<img src="llama.jpg" data-caption="Loquacious llama!" />';
        $expected = '<img src="llama.jpg" /><figcaption>Loquacious llama!</figcaption>';
        $output = $test($input)->getProcessedText();
        $this->assertStringContainsString($expected, $output);
        $this->assertStringContainsString("<!-- THEME HOOK: 'filter_caption' -->", $output);
    }

}