TimeZoneDeprecationTest.php

<?php

namespace Drupal\Tests\system\Kernel;

use Drupal\KernelTests\KernelTestBase;

/**
 * Tests deprecated methods in bootstrap throw deprecation warnings.
 *
 * @group legacy
 * @group system
 */
class TimeZoneDeprecationTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'system',
        'user',
    ];
    
    /**
     * @expectedDeprecation drupal_get_user_timezone() is deprecated in drupal:8.8.0. It will be removed from drupal:9.0.0. Use date_default_timezone_get() instead. See https://www.drupal.org/node/3009387
     */
    public function testDeprecation() {
        $this->assertEquals('Australia/Sydney', drupal_get_user_timezone());
    }

}