node/test/simple/test-tcp-reconnect.js

require("../common");
net = require('net');
var N = 50;

var c = 0;
var client_recv_count = 0;
var disconnect_count = 0;

var server = net.createServer(function (socket) {
  socket.addListener("connect", function () {
    socket.write("hello\r\n");
  });

  socket.addListener("end", function () {
    socket.close();
  });

  socket.addListener("close", function (had_error) {
    //puts("server had_error: " + JSON.stringify(had_error));
    assert.equal(false, had_error);
  });
});

server.listen(PORT);

server.addListener('listening', function () {
  puts('listening');
  var client = net.createConnection(PORT);

  client.setEncoding("UTF8");

  client.addListener("connect", function () {
    puts("client connected.");
  });

  client.addListener("data", function (chunk) {
    client_recv_count += 1;
    puts("client_recv_count " + client_recv_count);
    assert.equal("hello\r\n", chunk);
    client.close();
  });

  client.addListener("close", function (had_error) {
    puts("disconnect");
    assert.equal(false, had_error);
    if (disconnect_count++ < N)
      client.connect(PORT); // reconnect
    else
      server.close();
  });
});

process.addListener("exit", function () {
  assert.equal(N+1, disconnect_count);
  assert.equal(N+1, client_recv_count);
});