Shopware-Plugin test

FirstPlugin.php

<?php
namespace FirstPlugin;
use Shopware\Components\Plugin;

/**
 * Class FirstPlugin
 * @package FirstPlugin
 */
class FirstPlugin extends Plugin
{
    /**
     * @return array
     */
    public static function getSubscribedEvents(): array
    {
        return [
            'Enlight_Controller_Action_PreDispatch_Frontend_Detail' => 'dieInPreDispecth',
        ];
    }
    /**
     * @param \Enlight_Controller_ActionEventArgs $args
     */
    public function dieInPreDispecth(\Enlight_Controller_ActionEventArgs $args)
    {
        die(__FILE__);
    }
}

FirstPluginTest.php

<?php

namespace FirstPlugin\Test\Functional;

class FirstPluginTest extends \Enlight_Components_Test_Controller_TestCase
{

    public function testDieInPreDispecth()
    {
        $response = $this->dispatch('/detail/index/sArticle/8');
        dump($response);
    }
}