LocaleTranslationTest.php

<?php

namespace Drupal\Tests\locale\Kernel;

use Drupal\locale\LocaleTranslation;
use Drupal\KernelTests\KernelTestBase;

/**
 * @coversDefaultClass \Drupal\locale\LocaleTranslation
 * @group locale
 */
class LocaleTranslationTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'locale',
    ];
    
    /**
     * Tests that \Drupal\locale\LocaleTranslation is serializable.
     */
    public function testSerializable() {
        $translation = $this->container
            ->get('string_translator.locale.lookup');
        $this->assertInstanceOf(LocaleTranslation::class, $translation);
        // Prove that serialization and deserialization works without errors.
        $this->assertNotNull($translation);
        $unserialized = unserialize(serialize($translation));
        $this->assertInstanceOf(LocaleTranslation::class, $unserialized);
    }

}