在Symfony单元测试期间无法获取用户名

use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
use Symfony\Component\Security\Core\User\User;

class MyTest extends WebTestCase
{
    use Symfony\Bundle\FrameworkBundle\Test\SecurityTestTrait;

    public function testSomething()
    {
        $client = static::createClient();

        // 模拟用户登录
        $user = new User('username', 'password');
        $token = new UsernamePasswordToken($user, null, 'main', $user->getRoles());
        $this->logInUser($client, $token);

        // 在测试中获取用户名
        $username = $client->getContainer()->get('security.token_storage')->getToken()->getUser()->getUsername();

        // 进行断言或其他测试操作
        $this->assertEquals('username', $username);
    }
}