cucumber.js, a more functional example (world.js)

gistfile1.js

var req = require('superagent');
var Q = require('q');

var app, db, config

var World = function World(callback) {
  
  // app = ... insert code here to start up your express / whatever server and cleanse your database

  var self = this

  this.get = function(path) {
    var deferred = Q.defer()

    req.get("http://localhost:4000/api" + path)
      .set({ Accept : 'application/json' })
      .end(function(err, res) {
        if (err) {
          deferred.reject(new Error(err))
        } else {
          deferred.resolve(res.body)
        }
      })

    return deferred.promise
  }

  this.get = function(path) {
    var deferred = Q.defer();

    req.get("http://localhost:4000/api" + path)
      .set({ Accept : 'application/json' })
      .end(function(err, res) {
        if (err) {
          deferred.reject(new Error(err));
        } else {
          deferred.resolve(res.body);
        }
      })

    return deferred.promise;
  }

  this.post = function(path, json) {
    var deferred = Q.defer();

    req.post("http://localhost:4000/api" + path)
      .send(json)
      .end(function(err, res) {
        if (err) {
          deferred.reject(new Error(err));
        } else if (res.error) {
          deferred.reject(new Error(res.body[0].stack));
        } {
          deferred.resolve(res.body);
        }
      })

    return deferred.promise;
  }

};

exports.World = World;