test backbonejs with mocha on nodejs

I have a nodejs application which has the client-side code build with backbonejs and requirejs. I want to test the client-side code on my nodejs server using mocha.

My mocha test file: test/view.coffee

requirejs = require 'requirejs'
global.define = requirejs

requirejs.config
  nodeRequire: require
  baseUrl: '../public/javascripts/libs/'
  paths:
    jquery: "jquery"
    Underscore: "underscore"
    Backbone: "backbone"
  shim:
    'jquery':
      exports: '$'
    'Underscore':
      exports: '_'
    'Backbone':
      deps: ['jquery', 'Underscore']
      exports: 'Backbone'

requirejs ['../public/javascripts/views/test_view'], (TestView) ->
  describe 'TestView', ->
    view = new TestView()

The Backbonejs file to be tested: public/javascripts/views/test_view.coffee

define [
  'Backbone'
], (Backbone) ->
  class TestView extends Backbone.View
    initialize: ->
      ...
  TestView

In public/javascripts/libs I have the minified (not AMD) versions of jquery, backbone, and underscore.

When I run my test I get the following error message:

Error: Calling node's require("../public/javascripts/views/test_view")
failed with error: Error: Calling node's require("Underscore")
failed with error: Error: Cannot find module 'Underscore'
  at /node_modules/requirejs/bin/r.js:2262:27

Somehow the paths attribute of requirejs.config in test/view.coffee is not read. If I remove Backbone: "backbone" from paths, I dont't get an error message that the module 'Backbone' is missing. I didn't install Backbone and Underscore on the nodejs server.

Edit: Fixed the problem with the path by changing requirejs.config baseUrl to 'public/javascripts/views/test_view'. Requirejs is not using the path of the file (test/view.coffee) for the baseUrl block. For the requirejs ['...'], (TestView) part I have to use the path of the test/view.coffee file.

When I run my test with mocha I get the following error:

throw e; // process.nextTick error, or 'error' event on first tick
              ^
Error: Calling node's require("../public/javascripts/views/test_view")
  failed with error: TypeError: Object #<Object> has no method 'load'

Edit: I forgot to mention that I've added 'jade!templates/test_template' to my test_view. I removed it, and now mocha is running the test. But I get the error:

TypeError: object is not a function
  at Object.CALL_NON_FUNCTION_AS_CONSTRUCTOR (native)

the line:

view = new TestView()

is causing the error.