public function testSaltXDES()
{
$this->skipIf(!CRYPT_EXT_DES, 'Extended-DES is not supported.');
$saltPattern = "{^_[0-9A-Za-z./]{8}\$}";
$hashPattern = "{^_[0-9A-Za-z./]{19}\$}";
$log2 = 18;
$salt = Password::salt('xdes', $log2);
$this->assertPattern($saltPattern, $salt);
$this->assertNotEqual($salt, Password::salt('xdes', $log2));
$hash = Password::hash($this->_password, $salt);
$hash2 = Password::hash($this->_password, Password::salt('xdes', $log2));
$this->assertPattern($hashPattern, $hash);
$this->assertNotEqual($hash, $hash2);
}