Added sources for qt websocket tester

mainwindow.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <QMainWindow>
+#include <QWebSocket>
+
+#include <memory>
+
+namespace Ui { class MainWindow; }
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    explicit MainWindow(QWidget *parent = nullptr);
+    ~MainWindow();
+
+private slots:
+    void connectClicked();
+    void sendClicked();
+
+    void connected();
+    void disconnected();
+    void stateChanged(QAbstractSocket::SocketState state);
+    void textMessageReceived(const QString &message);
+    void binaryMessageReceived(const QByteArray &message);
+    void error(QAbstractSocket::SocketError error);
+    void pong(quint64 elapsedTime, const QByteArray &payload);
+
+private:
+    const std::unique_ptr<Ui::MainWindow> m_ui;
+    QWebSocket m_webSocket;
+};