gistfile1.js

_.extend(Function.prototype, {
  toRequestSpec: function(method, path, options) {
    var self = this;
    return function(done) {
      request(
        _.extend({
          method: method,
          url: 'http://localhost:' + port + path
        }, options || {}),
        function(req, res) {
          self.call(null, req, res, done);
        }
      );
    };
  }
});