<?php

declare(strict_types=1);

namespace App\Tests\Integration;

use Ibexa\Contracts\Core\Test\IbexaKernelTestCase;
use Ibexa\Contracts\Core\Test\IbexaTestKernel;
use Ibexa\Core\MVC\Symfony\Routing\ChainRouter;

final class ExampleTest extends IbexaKernelTestCase
{
    public function testExample(): void
    {
        self::assertInstanceOf(
            ChainRouter::class,
            self::bootKernel()->getContainer()->get('router'),
        );
    }

    protected static function getKernelClass(): string
    {
        return IbexaTestKernel::class;
    }
}

There was 1 failure:
1) App\Tests\Integration\ExampleTest::testExample
Failed asserting that "Ibexa\Bundle\Core\Routing\DefaultRouter" Object (...) is an instance of class "Ibexa\Core\MVC\Symfony\Routing\ChainRouter".
/var/www/html/tests/Integration/ExampleTest.php:17

<?php
return [
    Symfony\Bundle\FrameworkBundle\FrameworkBundle::class => ['all' => true],
    ....
    Ibexa\Bundle\Core\IbexaCoreBundle::class => ['all' => true],

    public function registerBundles(): iterable
    {
        yield new SecurityBundle();
        yield new IbexaCoreBundle(); // <--- 
        yield new IbexaLegacySearchEngineBundle();
        yield new JMSTranslationBundle();
        yield new FOSJsRoutingBundle();
        yield new FrameworkBundle(); // <--- 
        yield new LiipImagineBundle();
        yield new TwigBundle();
        yield new DoctrineBundle();
    }