TranslationWrapperTest.php

<?php

namespace Drupal\Tests\Core\StringTranslation;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\StringTranslation\TranslationWrapper;
use Drupal\Tests\UnitTestCase;

/**
 * Tests the TranslationWrapper class.
 *
 * @coversDefaultClass \Drupal\Core\StringTranslation\TranslationWrapper
 * @group StringTranslation
 */
class TranslationWrapperTest extends UnitTestCase {
    
    /**
     * @covers ::__construct
     * @group legacy
     */
    public function testTranslationWrapper() {
        $this->expectDeprecation('Drupal\\Core\\StringTranslation\\TranslationWrapper is deprecated in drupal:8.0.0 and is removed from drupal:11.0.0. Use the \\Drupal\\Core\\StringTranslation\\TranslatableMarkup class instead. See https://www.drupal.org/node/2571255');
        $object = new TranslationWrapper('Deprecated');
        $this->assertInstanceOf(TranslatableMarkup::class, $object);
    }

}