public function testCircularGetCurrentUser()
{
// ensure getCurrentUser neither run indefinetely, nor throw maximum
// function all error
$avatar = LeanFile::createWithUrl("alice.png", "https://leancloud.cn/favicon.png");
$user = LeanUser::logIn("alice", "blabla");
$user->set("avatar", $avatar);
$user->save();
$token = LeanUser::getCurrentSessionToken();
$user->logOut();
LeanUser::setCurrentSessionToken($token);
$user2 = LeanUser::getCurrentUser();
$this->assertEquals($user2->getUsername(), "alice");
}