Socket.ping()

import ws from 'k6/ws';
export default function () {
  var url = 'ws://echo.websocket.org';
  var response = ws.connect(url, null, function (socket) {
    socket.on('open', function () {
      socket.on('pong', function () {
        // As required by the spec, when the ping is received, the recipient must send back a pong.
        console.log('connection is alive');
      });
      socket.ping();
    });
  });
}