stubbing amd module

main.js

require.config({
  urlArgs: (new Date()).getTime(),
  baseUrl: './'
});

window.createContext = stubContext({
  shim: {
    'underscore': {
      exports: '_'
    },
    'backbone': {
      deps: ['underscore', 'jquery'],
      exports: 'Backbone'
    }
  },
  urlArgs: (new Date()).getTime(),
  baseUrl: './',
  paths: {
    jquery: 'libs/jquery.min',
    underscore: 'libs/underscore-min',
    backbone: 'libs/backbone-min'
  }
});

require([
    'spec/models/todo.spec'
  , 'spec/collections/todos.spec'
  , 'spec/views/todolist.spec'
]);

stub-context.js

// https://coderwall.com/p/teiyew

function stubContext(config) {
  return function(stubs) {
    var map = {},
        context;

    _.each(stubs, function(val, key) {
      var stubName = 'stub_' + key;

      map[key] = stubName;
    });

    context = require.config(
      _.extend({
        context: Math.floor(Math.random() * 1000000),
        map: {
          "*": map
        }
      }, config)
    );

    _.each(stubs, function(val, key) {
      var stubName = 'stub_' + key;

      define(stubName, function() {
        return val;
      });
    });

    return context;
  };
}

todolist.spec.js

$(function() {

  var todoItem = new Backbone.View(),
      TodoItemStub = sinon.stub().returns(todoItem),
      stubs = {
        'views/todo': TodoItemStub
      },
      context = createContext(stubs);

  context(['views/todolist'], function(TodoList) {
    describe('TodoList', function() {

      beforeEach(function() {
        this.todoList = new TodoList();
      });

      describe('描画', function() {
        beforeEach(function() {
          this.todo1 = new Backbone.Model({ id: 1 });
          this.todo2 = new Backbone.Model({ id: 2 });
          this.todo3 = new Backbone.Model({ id: 3 });
          this.todoList.collection = new Backbone.Collection([
            this.todo1,
            this.todo2,
            this.todo3
          ]);
          this.todoList.render();
        });

        it ('各todoモデルに対してTodoItemビューを描画すること', function() {
          expect(TodoItemStub).toHaveBeenCalledThrice();
        });
      });

    });
  });

});