m.js

YUI.add('mojito', function(Y, NAME) {

    Y.namespace('mojito');

}, '0.1.0', {requires: []});

package.json

{
    "name": "mojito",
    "version": "0.5.0pr1",
    "description": "Mojito provides an architecture, components and tools for developers to build complex web applications faster.",
    "preferGlobal": true,
    "author": "Drew Folta <folta@yahoo-inc.com>",
    "contributors": [
        "Ric Allinson <allinson@yahoo-inc.com>",
        "Matt Taylor <mtaylor@yahoo-inc.com>",
        "Chris Klaiber <cklaiber@yahoo-inc.com>",
        "Drew Folta <folta@yahoo-inc.com>",
        "Martin Cooper <mcooper@yahoo-inc.com>",
        "Isao Yagi <isao@yahoo-inc.com>",
        "Michael Ridgway <mridgway@yahoo-inc.com>",
        "Caridy Patino <caridy@yahoo-inc.com>"
    ],
    "dependencies": {
        "yui": "~3.7.2",
        "request": "2.9.202"
    },
    "keywords": [
        "framework",
        "webapp"
    ],
    "main": "lib/mojito",
    "directories": [
        "bin",
        "docs",
        "lib"
    ],
    "bin": {
        "mojito": "bin/mojito"
    },
    "engines": {
        "node": ">0.4",
        "npm": ">1.0"
    },
    "homepage": "http://developer.yahoo.com/cocktails/mojito/",
    "repository": {
        "type": "git",
        "url": "git://github.com/yahoo/mojito.git"
    },
    "bugs": "https://github.com/yahoo/mojito/issues",
    "scripts": {
        "test": "./tests/run.js test -u --group server --driver nodejs && ./tests/run.js test -u --group client --driver selenium"
    },
    "yahoo": {
        "mojito": {
            "type": "bundle",
            "location": "lib/app"
        }
    }
}

s.js

YUI.add('mojito-resource-store', function(Y, NAME) {

    Y.mojito.ResourceStore = 'You have a winner!';

}, '0.0.1', { requires: [
    'base',
    'oop',
    'mojito-util'
]});

test.js

var libpath = require('path'),
    YUIFactory = require('./yui-sandbox.js'),
    YUI = YUIFactory.getYUI();

var Z = require('yui').YUI({
    useSync: true,
    modules: {
        'mojito': {
            fullpath: libpath.join(__dirname, 'm.js')
        },
        'mojito-util': {
            fullpath: libpath.join(__dirname, 'u.js')
        },
        'mojito-resource-store': {
            fullpath: libpath.join(__dirname, 's.js')
        }
    }
});
Z.use('mojito-resource-store');
console.log('yui: ', Z.mojito.ResourceStore);

var Y = YUI({
    useSync: true,
    modules: {
        'mojito': {
            fullpath: libpath.join(__dirname, 'm.js')
        },
        'mojito-util': {
            fullpath: libpath.join(__dirname, 'u.js')
        },
        'mojito-resource-store': {
            fullpath: libpath.join(__dirname, 's.js')
        }
    }
});
Y.use('mojito-resource-store');
console.log('sandbox: ', Y.mojito && Y.mojito.ResourceStore);

u.js

YUI.add('mojito-util', function(Y) {

    Y.mojito.util = {};

}, '0.1.0', {requires: [
    'array-extras',
    'json-stringify',
    'mojito'
]});

yui-sandbox.js

/*jslint nomen:true, sloppy: true, stupid: true, node: true*/

var fs = require('fs'),
    path = require('path'),
    vm = require('vm'),
    file = path.join(__dirname, '..', 'node_modules', 'yui', 'yui-nodejs', 'yui-nodejs.js'),
    code = fs.readFileSync(file, 'utf8');

exports.getYUI = function () {
    var sandbox = {
        console: console,
        process: process,
        require: require,
        module: module,
        setTimeout: setTimeout,
        setInterval: setInterval,
        __filename: __filename,
        __dirname: __dirname,
        exports: {}
    };
    vm.runInNewContext(code, sandbox, 'build/yui-new/yui-new.js');
    return sandbox.exports.YUI;
};