public function executeAction()
    {
        if ($this->isUsage()) return [self::FORWARD_ACTION, 'spec.usage'];

        // production
        if ($this->application->isProduction() && ! $this->response->confirmation('May I execute spec in production environment ?')) {
            $this->send('aborted.');
            return;
        }

        $this->setup();
        $this->run();
    }