Asynchronous Vows

vows-example.js

(function () {
  "use strict";

  var vows = require('vows')
    , suite
    , batch
    , helloWorld = require('./index')
    , assert = require('assert')
    , request = require('ahr2')
    , createJoin = require('join')
    , forEachAsync = require('forEachAsync')
    ;

  batch = {
      'foo context': {
          topic: function () {
            return helloWorld();
          }
        , 'helloWorld output test': function (msg) {
            assert.strictEqual(msg, 'Hello World!');
          }
      }
    , 'test foobar3000': {
          topic: function () {
            request('http://foobar3000.com/echo/bar.json').when(this.callback);
          }
        , 'foobar3000 pathname test': function (err, ahr, body) {
            assert.strictEqual(body.pathname, '/echo/bar.json');
          }
      }
    , 'test join foobar3000': {
          topic: function () {
            var join = createJoin()
              ;

            request('http://foobar3000.com/echo/baz.json').when(join.add());
            request('http://foobar3000.com/echo/quux.json').when(join.add());

            join.when(this.callback);
          }
        , 'foobar3000 pathname test': function (res1, res2) {
            //var args = Array.prototype.slice(arguments);
            var body1 = res1[2]
              , body2 = res2[2]
              ;

            assert.strictEqual(body1.pathname, '/echo/baz.json');
            assert.strictEqual(body2.pathname, '/echo/quux.json');
          }
        , 'teardown': function (topic) {
            console.log('in teardown function');
          }
      }
    , 'test forEachAsync foobar3000': {
          topic: function () {
            var urls
              , self = this
              ;

            urls =[
                '/echo/qux.json'
              , '/echo/hurp.json'
            ];

            forEachAsync(urls, function (next, url) {
              request('http://foobar3000.com' + url).when(next);
            }).then(function () {
              self.callback(true);
            });
          }
        , 'foobar3000 pathname test': function (finished) {
              // at least we got here
              assert.ok(finished);
          }
      }
  };

  suite = vows.describe('my-test');
  suite.addBatch(batch);

  suite.export(module);
}());

Added a teardown function. See http://stackoverflow.com/questions/7065035/how-to-run-cleanup-with-vows-js and vowsjs/vows#14 for discussion on it, but it runs after the vows in the context finish.