TestHelpTopicPlugin.php

<?php

namespace Drupal\help_topics_test\Plugin\HelpTopic;

use Drupal\Core\Cache\Cache;
use Drupal\help_topics\HelpTopicPluginBase;

/**
 * A fake help topic plugin for testing.
 */
class TestHelpTopicPlugin extends HelpTopicPluginBase {
    
    /**
     * {@inheritdoc}
     */
    public function getBody() {
        return [
            '#type' => 'markup',
            '#markup' => $this->pluginDefinition['body'],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheContexts() {
        return [];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheTags() {
        return [
            'foobar',
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheMaxAge() {
        return Cache::PERMANENT;
    }

}