text: 'use strict';
  var common = require('../common');
  var assert = require('assert');
  var net = require('net');
  
  
  var tests_run = 0;
  
  function pingPongTest(port, host, on_complete) {
    var N = 100;
    var DELAY = 1;
    var count = 0;
    var client_ended = false;
  
    var server = net.createServer({ allowHalfOpen: true }, function(socket) {
      socket.setEncoding('utf8');
  
      socket.on('data', function(data) {
        console.log(data);
        assert.equal('PING', data);
        assert.equal('open', socket.readyState);
        assert.equal(true, count <= N);
        setTimeout(function() {
          assert.equal('open', socket.readyState);
          socket.write('PONG');
        }, DELAY);
      });
  
      socket.on('timeout', function() {
        common.debug('server-side timeout!!');
        assert.equal(false, true);
      });
  
      socket.on('end', function() {
        console.log('server-side socket EOF');
        assert.equal('writeOnly', socket.readyState);
        socket.end();
      });
  
      socket.on('close', function(had_error) {
        console.log('server-side socket.end');
        assert.equal(false, had_error);
        assert.equal('closed', socket.readyState);
        socket.server.close();
      });
    });
  
    server.listen(port, host, function() {
      var client = net.createConnection(port, host);
  
      client.setEncoding('utf8');
  
      client.on('connect', function() {
        assert.equal('open', client.readyState);
        client.write('PING');
      });
  
      client.on('data', function(data) {
        console.log(data);
        assert.equal('PONG', data);
        assert.equal('open', client.readyState);
  
        setTimeout(function() {
          assert.equal('open', client.readyState);
          if (count++ < N) {
            client.write('PING');
          } else {
            console.log('closing client');
            client.end();
            client_ended = true;
          }
        }, DELAY);
      });
  
      client.on('timeout', function() {
        common.debug('client-side timeout!!');
        assert.equal(false, true);
      });
  
      client.on('close', function() {
        console.log('client.end');
        assert.equal(N + 1, count);
        assert.ok(client_ended);
        if (on_complete) on_complete();
        tests_run += 1;
      });
    });
  }
  
  pingPongTest(common.PORT);
  
  process.on('exit', function() {
    assert.equal(1, tests_run);
  });
  