Some test cases for a TCP chat server.

chat_server_test.js

var net = require('net');
var async = require('async');

function produceClient (callback) {
  var client = net.connect({port:1337, host:process.env['HOSTNAME']});
  client.on('connect', function(data) { callback(null,client) });
  client.on('error', function() { callback('failed') });
};

async.series([produceClient,produceClient,produceClient],
  function(err, results){
    if(err) {
      throw err;
    }
    else {
      testCase(results);
    }
  });

function testCase(sockets) {
  var alice = sockets[0];
  var mary  = sockets[1];
  var john  = sockets[2];
  setTimeout(function() { alice.write('hello\n') },100);
  async.parallel([
      function(callback) {
        alice.on('data', function(data) {
          if (data.toString() == 'Welcome to chat server\n');
          else if (data.toString() == 'Message Sent\n') callback(null,'ok');
          else callback('failed');
        });
      },
      function(callback) {
        mary.on('data', function(data) {
          if (data.toString() == 'Welcome to chat server\n');
          else if (data.toString() == 'hello\n') callback(null,'ok');
          else callback('failed');
        });
      },
      function(callback) {
        john.on('data', function(data) {
          if (data.toString() == 'Welcome to chat server\n');
          else if (data.toString() == 'hello\n') callback(null,'ok');
          else callback('failed');
        });
      }
      ],
    function (err, results) {
      if (err) {
        throw err;
      }
      else {
        console.log('tests passed');
        process.exit(0);
      }
    });
}