public function testEntropy()
{
$match = new Bruteforce('99', 0, 1, '99');
$this->assertSame(log(pow(10, 2), 2), $match->getEntropy());
$password = '******';
$match = new Bruteforce($password, 0, 3, $password);
$this->assertSame(95, $match->getCardinality());
$this->assertSame(log(pow(95, 4), 2), $match->getEntropy());
}
/**
* Make a bruteforce match object for substring of password.
*
* @param string $password
* @param int $begin
* @param int $end
* @param int $cardinality optional
*
* @return Bruteforce match
*/
protected function makeBruteforceMatch($password, $begin, $end, $cardinality = null)
{
$match = new Bruteforce($password, $begin, $end, substr($password, $begin, $end + 1), $cardinality);
// Set entropy in match.
$match->getEntropy();
return $match;
}