get db es la papa

lapapa.js

// ./lib/controllers/user.js

var getDb = require('mongo-getdb');

var controller = module.exports;

controller.getUserById = function(id, callback) {
  var criteria = { username: id, deleted: { $ne: true } };
	this.getUserByCriteria(criteria, callback);
};

controller.getUserByCriteria = function(criteria, callback) {
	this.withDb(function(db){
		db.collection('profiles').findOne(criteria, callback);
	});
};

controller.withDb = function(callback) {
	getDb(callback);
};

// el test con sinon

var  should = require('should'),
		sinon = require('sinon'),
		controller = require('../../../lib/controllers/user.js');

describe("User Controller (new version)", function() {

	it("should create the criteria for searching by username", function(done) {
		var getUserByCriteria = sinon.stub(controller, "getUserByCriteria");
		getUserByCriteria.callsArgWith(1, undefined, { username: 'johnnyhalife' } );

		controller.getUserById('johnnyhalife', function(err, user) {
			user.username.should.equal('johnnyhalife');

			getUserByCriteria.called.should.equal(true);
			controller.getUserByCriteria.restore();

			done();
		});
	});

	it("should look for the user with a given criteria", function(done) {
		var result = { username: 'johnnyhalife' };
		var criteria = { username: 'johnnyhalife',  deleted: { $ne : true } };

		var collection = sinon.mock({ findOne: function(){ } });
		collection.expects('findOne').withArgs(criteria).callsArgWith(1, undefined, result);

		var db = sinon.mock({ collection: function(){ } });
		db.expects('collection').withArgs('profiles').returns(collection.object);

		// stub the database
		var withDb = sinon.stub(controller, "withDb");
		withDb.callsArgWith(0, db.object);

		controller.getUserByCriteria(criteria, function(err, user) {
			[db, collection].forEach(function(d) { d.verify(); });

			result.should.equal(user);

			withDb.called.should.equal(true);
			controller.withDb.restore();

			done();
		});
	});
	
});