Backbone jasmine sinon.stub typeError

Question

I'm trying to write a simple spec for a Backbone Todos collection which stubs the Backbone Todo model.

Here's my spec:

describe "TodoApp.Collections.Todos", ->

  beforeEach ->
    @todoStub = sinon.stub window, 'TodoApp.Models.Todo'

  afterEach ->
    @todoStub.restore()

This gives me the following error:

TypeError: Attempted to wrap undefined property TodoApp.Models.Todo as function

The Todo model is defined though as todo = new TodoApp.Models.Todo() doens't give an error.

Is it a scoping issue? Could somebody point me in the right direction?

score 8 · Accepted Answer · answered Apr 23 '12 at 10:51

I just ran into that problem too. You should call it like this...

    beforeEach ->
            @todoStub = sinon.stub window.TodoApp.Models, 'Todo'

instead of this.

    beforeEach ->
            @todoStub = sinon.stub window, 'TodoApp.Models.Todo'

this solved the problem for me

@smek: this also solves your problem from http://tinnedfruit.com/2011/03/25/testing-backbone-apps-with-jasmine-sinon-2.html

score 1 · Answer 2 · answered Feb 22 '12 at 16:57

1

The syntax you're using sinon.stub window, 'TodoApp.Models.Todo' would be for wrapping window['TodoApp.Models.Todo'] as a function. http://sinonjs.org/docs/#stubs

With sinon you're more likely going to be wrapping a particular function on your Todo model with a stub: sinon.stub TodoApp.Models.Todo, 'Foo'.

Sinon can stub an entire object but I think it's designed to be more granular.

answered Feb 22 '12 at 16:57

Eric Bock

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Hi Erick, thanks for your answer. I'm trying to stub the todo model so I can test the todos collection in isolation. I'm following the example on http://tinnedfruit.com/2011/03/25/testing-backbone-apps-with-jasmine-sinon-2.html where is states you can stub the models constructor function like this. – smek Feb 22 '12 at 21:07
@smek have you attached your ```Todo``` model to ```window```, similar to this: http://stackoverflow.com/questions/4214731/coffeescript-global-variables ? – Eric Bock Feb 23 '12 at 16:45
@Erick I've defined my model with: class window.TodoApp.Models.Todo extends Backbone.Model – smek Feb 24 '12 at 09:08
@EricBock I have a similar requirement to stub an entire BackBone Model object using SinonJS. The link ( stub an entire object ) which you posted doesnt seem to work. Is there any other example link for the same, I tried the http://tinnedfruit.com/2011/03/25/testing-backbone-apps-with-jasmine-sinon-2.html tutorial, but getting errors like "Attempted to wrap undefined property Todo as function" – Remis Haroon - رامز Sep 14 '15 at 11:56

Backbone jasmine sinon.stub typeError

2 Answers2