bring redis up/down for testing

gistfile1.js

var exec = require('child_process').exec;
var redis = require("redis");
var when = require('when');
var client;

exports.startServer = function () {
  exec('redis-server');
}

exports.stopServer = function () {
  client && client.shutdown();
}

exports.createClient = function () {
  var deffered = when.defer();

  if (client) {
    deffered.resolve(client);
  }
  else {
    client = redis.createClient();
    client.on('connect', function () {
      deffered.resolve(client);
    });
  }

  return deffered;
}