Backbone integration tests: looking for helpers like Ember's

I've been looking at Ember's test helpers for integration testing and some example tests like here. I would like to write tests for a Backbone.js app I am maintaining in a similar manner. I have looked at tools such as Chai and Sinon and got the feeling that these produce a much more convoluted testing code and are hard to maintain.

• Are there any similar libraries such as the Ember helpers for Backbone
• Is there any reason why no one has written such helpers?