test file

locations

js
    model
        user.js
test
    test.js

Error: Calling node's require("model/user") failed with error: Error: Cannot find module 'model/user'

test.js

var assert = require("assert"),
    requirejs = require('requirejs');

requirejs.config = {
    baseUrl: __dirname + '../js/', // Also tried just '../js' and '../js/'
    nodeRequire: require,
    paths: {
        'jquery'                        : 'libs/jquery/jquery-1.7.min',
        'underscore'                    : 'vendor/underscore',
        'backbone'                      : 'vendor/backbone',
        'visualsearch'                  : 'libs/backbone/visualsearch',
        'templates'                     : 'templates/templates',
        'moment'                        : 'libs/moment/moment.min'
    }
};

console.log(requirejs.config.baseUrl + 'model/user');
describe('User Model', function() {
    
    it('should have an ID', function() {
        requirejs(['model/user'], function(User) {
            var user = new User({ uuid: '123' });
            
            assert.ok(user.id);
            done();
        });
    });
        
});