node/test/common.js

var path = require("path");

exports.testDir = path.dirname(__filename);
exports.fixturesDir = path.join(exports.testDir, "fixtures");
exports.libDir = path.join(exports.testDir, "../lib");
exports.PORT = 12346;

exports.assert = require('assert');

var sys = require("sys");
for (var i in sys) exports[i] = sys[i];
//for (var i in exports) global[i] = exports[i];

function protoCtrChain (o) {
  var result = [];
  for (; o; o = o.__proto__) { result.push(o.constructor); }
  return result.join();
}

exports.indirectInstanceOf = function (obj, cls) {
  if (obj instanceof cls) { return true; }
  var clsChain = protoCtrChain(cls.prototype);
  var objChain = protoCtrChain(obj);
  return objChain.slice(-clsChain.length) === clsChain;
};