public function test_random_string()
{
// Make sure the generated string contains only human friendly characters and is 30 characters long
$str = util::random_string(30);
$this->assertTrue((bool) preg_match('/^([ABCDEFGHJKLMNPQRSTUVWXYZabcdefhjkmnprstuvwxyz23456789]{30})$/', $str));
// Make sure the generated string is 30 characters long
$str = util::random_string(30, false, true);
$this->assertTrue(strlen($str) === 30, 'random_string produced an invalid length string');
// Make sure the generated string is 120 characters long
$str = util::random_string(120);
$this->assertTrue(strlen($str) === 120, 'random_string produced an invalid length string');
// Make sure the string doesn't contain duplicate letters
$str = util::random_string(53, true, false, true);
$this->assertTrue(strlen($str) === 53, 'random_string produced an invalid length string');
$this->assertTrue(count(array_unique(str_split($str))) === strlen($str), 'random_string produced a string with duplicate characters');
// Longer length than characters available
try {
$str = util::random_string(55, true, false, true);
$this->assertTrue(false);
} catch (Exception $e) {
$this->assertTrue(true);
}
// Test secure variant
$str = util::secure_random_string(16);
$this->assertTrue(strlen($str) === 16);
// Longer length than characters available
try {
$str = util::secure_random_string(0);
$this->assertTrue(false);
} catch (Exception $e) {
$this->assertTrue(true);
}
}
