node/test/simple/test-net-pause-resume-connecting.js

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var common = require('../common'),
    assert = require('assert'),
    net = require('net');

var connections = 0,
    dataEvents = 0,
    conn;


// Server
var server = net.createServer(function(conn) {
  connections++;
  conn.end('This was the year he fell to pieces.');

  if (connections === 5)
    server.close();
});

server.listen(common.PORT);


// Client 1
conn = require('net').createConnection(common.PORT, 'localhost');
conn.resume();
conn.on('data', onDataOk);


// Client 2
conn = require('net').createConnection(common.PORT, 'localhost');
conn.pause();
conn.resume();
conn.on('data', onDataOk);


// Client 3
conn = require('net').createConnection(common.PORT, 'localhost');
conn.pause();
conn.on('data', onDataError);
scheduleTearDown(conn);


// Client 4
conn = require('net').createConnection(common.PORT, 'localhost');
conn.resume();
conn.pause();
conn.resume();
conn.on('data', onDataOk);


// Client 5
conn = require('net').createConnection(common.PORT, 'localhost');
conn.resume();
conn.resume();
conn.pause();
conn.on('data', onDataError);
scheduleTearDown(conn);


// Client helper functions
function onDataError() {
  assert(false);
}

function onDataOk() {
  dataEvents++;
}

function scheduleTearDown(conn) {
  setTimeout(function() {
    conn.removeAllListeners('data');
    conn.resume();
  }, 100);
}


// Exit sanity checks
process.on('exit', function() {
  assert.strictEqual(connections, 5);
  assert.strictEqual(dataEvents, 3);
});