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Editorial Team
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Asked: 2026-06-02T10:42:46+00:00

I’m trying to write a simple spec for a Backbone Todos collection which stubs

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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?

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1 Answer

  1. Editorial Team

    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

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