Gajus\Vlad\Assertion::is PHP Méthode

    public function is($validator_name, array $validator_options = null, array $condition_options = [])
    {
        if ($validator_options === null) {
            $validator_options = [];
        }
        if (!is_string($validator_name)) {
            throw new \Gajus\Vlad\Exception\InvalidArgumentException('Validator name must be a string.');
        }
        if (strpos($validator_name, '\\') === false) {
            $validator_name = 'Gajus\\Vlad\\Validator\\' . $validator_name;
        }
        if (!class_exists($validator_name)) {
            throw new \Gajus\Vlad\Exception\InvalidArgumentException('Validator not found.');
        } else {
            if (!is_subclass_of($validator_name, 'Gajus\\Vlad\\Validator')) {
                throw new \Gajus\Vlad\Exception\InvalidArgumentException('Validator must extend Gajus\\Vlad\\Validator.');
            }
        }
        $this->assertions[] = ['validator' => new $validator_name($validator_options), 'options' => $condition_options];
        return $this;
    }