hackety.js

var givens = {};
var Given = function (pattern, topicGenerator) {
  givens[pattern] = topicGenerator;
};

var whens = {};
var When = function (pattern, topicGenerator) {
  whens[pattern] = topicGenerator;
};

var thens = {};
var Then = function (pattern, callback) {
  thens[pattern] = callback;
});

Given(/^I have a hello world httpServer$/, function () {
  return require("http").createServer().listen(8080);
});

When(/^I make a request$/, function () {
  var client = require("http").createClient(8080, "localhost");
  var req = client.request("GET", "/");
  req.end();
  req.on("response", function (res) {
    res.on("data", function (data) {
      this.callback(data);
    });
  });
});

Then(/^I should see "(.+)"$/, function (str) {
  return function (data) { // The callback
    assert.equal(data, str);
  };
});

fs.readFile("./httpServer.feature", function (err, data) {
  data.split("\n");
  // Parse out Givens, Whens, Thens
  // Match via givens, whens, and thens maps defined in step defs
  // Use mapped values in a vows structure.
});

httpServer.feature

Given I have a hello world httpServer
When I make a request
Then I should see "Hello World"