node/test/parallel/test-net-server-pause-on-connect.js

'use strict';
const common = require('../common');
const assert = require('assert');
const net = require('net');
const msg = 'test';
var stopped = true;
var server1Sock;


const server1ConnHandler = function(socket) {
  socket.on('data', function(data) {
    if (stopped) {
      common.fail('data event should not have happened yet');
    }

    assert.equal(data.toString(), msg, 'invalid data received');
    socket.end();
    server1.close();
  });

  server1Sock = socket;
};

const server1 = net.createServer({pauseOnConnect: true}, server1ConnHandler);

const server2ConnHandler = function(socket) {
  socket.on('data', function(data) {
    assert.equal(data.toString(), msg, 'invalid data received');
    socket.end();
    server2.close();

    assert.equal(server1Sock.bytesRead, 0, 'no data should have been read yet');
    server1Sock.resume();
    stopped = false;
  });
};

const server2 = net.createServer({pauseOnConnect: false}, server2ConnHandler);

server1.listen(common.PORT, function() {
  const clientHandler = common.mustCall(function() {
    server2.listen(common.PORT + 1, function() {
      net.createConnection({port: common.PORT + 1}).write(msg);
    });
  });
  net.createConnection({port: common.PORT}).write(msg, clientHandler);
});

process.on('exit', function() {
  assert.equal(stopped, false);
});