/**
* Assertion helper
*
* @param string pattern
* @param security.Principal p
* @param string cause
* @throws unittest.AssertionFailedError
*/
protected function assertPrincipal($pattern, Principal $p, $cause)
{
if (!preg_match($pattern, $p->getName())) {
$this->fail($cause . ' did not match', $p->getName(), $pattern);
}
}
