Method config_with_port

cpp/src/test_handler.hpp:99–103

  protected:
    string config_with_port(const string& bare_config) {
        ostringstream ss;
        ss << "{" << "\"port\":" << listener_.port() << ", " << bare_config << "}";
        return ss.str();
    }

    void connect(container& c, const string& bare_config) {
        connection_options opts;