UserLegacyTest.php

<?php

namespace Drupal\Tests\user\Kernel;

use Drupal\KernelTests\KernelTestBase;

/**
 * Tests legacy user functionality.
 *
 * @group user
 * @group legacy
 */
class UserLegacyTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'user',
    ];
    public function testUserPassword() {
        $this->expectDeprecation('user_password() is deprecated in drupal:9.1.0 and is removed from drupal:10.0.0. Use \\Drupal\\Core\\Password\\PasswordGeneratorInterface::generate() instead. See https://www.drupal.org/node/3153113');
        $this->assertNotEmpty(user_password());
    }

}