Method onError

tests/test_ws.cpp:63–63

    void onWSDisconnected() override { disconnected = true; }
    void onWSReceived(const void* buffer, size_t size) override { received += size; }
    void onError(int error, const std::string& category, const std::string& message) override { errors = true; }

public:
    std::atomic<bool> connected{false};