StringSerializationTest.php

<?php

namespace Drupal\KernelTests\Core\DependencyInjection;

use Drupal\KernelTests\KernelTestBase;

/**
 * Tests serialization of string services.
 *
 * @group DependencyInjection
 * @group legacy
 */
class StringSerializationTest extends KernelTestBase {
    
    /**
     * Tests that strings are not put into the container class mapping.
     */
    public function testSerializeString() {
        $this->assertIsString($this->container
            ->get('app.root'));
        $this->container
            ->getServiceIdMappings();
        $this->assertIsString($this->container
            ->get('app.root'));
    }

}