SimpleSAML\Test\BuiltInServer::setRouter PHP Method

    public function setRouter($router)
    {
        $file = dirname(dirname(__FILE__)) . '/tests/routers/' . $router . '.php';
        if (!file_exists($file)) {
            throw new \InvalidArgumentException('Unknown router "' . $router . '".');
        }
        $this->router = $file;
    }