public function testEncryptData()
{
if (!extension_loaded('mcrypt')) {
$this->markTestSkipped('mcrypt extension is required to test encrypt feature.');
}
$sm = new CSecurityManager();
$sm->encryptionKey = '123456';
$data = 'this is raw data';
$encryptedData = $sm->encrypt($data);
$this->assertTrue($data !== $encryptedData);
$data2 = $sm->decrypt($encryptedData);
$this->assertEquals($data, $data2);
}