Webmozart\Assert\Assert::throws PHP 메소드

    public static function throws(Closure $expression, $class = 'Exception', $message = '')
    {
        static::string($class);
        $actual = 'none';
        try {
            $expression();
        } catch (Exception $e) {
            $actual = get_class($e);
            if ($e instanceof $class) {
                return;
            }
        } catch (Throwable $e) {
            $actual = get_class($e);
            if ($e instanceof $class) {
                return;
            }
        }
        static::reportInvalidArgument($message ?: sprintf('Expected to throw "%s", got "%s"', $class, $actual));
    }