public function testUnsubscribeTokenEncryptDecrypt()
{
$uid = 26;
$u = new User();
$u->setId($uid);
$token = CryptUtility::getUnsubscribeToken($u, UserPreference::USER_PREFERENCE_MOOC_TRACKER_COURSES, $this->key);
$details = CryptUtility::decryptUnsubscibeToken($token, $this->key);
$this->assertEquals($uid, $details['userId']);
$this->assertEquals(UserPreference::USER_PREFERENCE_MOOC_TRACKER_COURSES, $details['prefId']);
}
