Heartbeat

test/SenderInterface.test.js

@@ -35,6 +35,7 @@ describe('Sender Interface and TelnetSenderGRBL implementation', () => {
       createConnection: () => {
         const socket = new EventEmitter();
         socket.end = jest.fn();
+        socket.setKeepAlive = jest.fn(); // benötigt für TCP-Keepalive im connect-Handler
 
         process.nextTick(() => {
           connectAttempts += 1;
@@ -68,6 +69,8 @@ describe('Sender Interface and TelnetSenderGRBL implementation', () => {
       netModule: netMock,
       TelnetSocketClass: DummyTelnetSocket,
       setTimeoutFn: (fn) => fn(),
+      setIntervalFn:  jest.fn(() => 1),  // Heartbeat-Timer: kein echter Intervall
+      clearIntervalFn: jest.fn(),
       autoConnect: false,
       reconnectDelay: 1,
       maxReconnectDelay: 2