gistfile1.js

        var User = new WOG({
            name: 'user',
            schema: {
                name: Joi.string().required(),
                age: Joi.number().integer().default(20)
            }
        });

        var Plugin = function (collection) {

                expect(collection).to.exist();
                expect(collection.name).to.equal('user');
                expect(collection.schema.isJoi).to.equal(true);

                var user = new User({ name: 'test' });
                expect(user.test).to.exist();
                expect(user.test()).to.equal('test');

                expect(User.test).to.exist();
                expect(User.test()).to.equal(true);
                done();
        };

        Plugin.prototype.test = function () {
            return this.name;
        };

        Plugin.test = function () {
            return true;
        };

        User.use(Plugin);