What is the best Unit testing framework for iPhone?

Which JavaScript unit testing framework should I use with Backbone.js and why?

• JavaScript MVC framework Backbone.js is very useful but I wonder how developers do unit testing to keep quality. I also use underscore.js/jquery

• Answer:

  For unit tests that might test particular functions in your Models and Collections, you can consider standard JavaScript testing suites, such as QUnit (http://docs.jquery.com/QUnit), or BDD test suites, such as Jasmine (http://pivotal.github.com/jasmine/).  Use these to test individual functions as you would for testing any other JavaScript application (in fact, Backbone.js itself uses QUnit for its own unit testing). For functional tests where you want to see how users would actually interact with your web application, consider using Selenium (http://seleniumhq.org/) or PhantomJS (http://phantomjs.org/) with the above testing frameworks to automate actual browser motions that would be performed by your users.  There's also tools like Yeti (http://yeti.cx/), though I believe Yeti only works with the YUI Test framework at the moment, to quickly test on multiple browsers at the same time.  In the end, testing a Backbone.js app is really no different than testing any other large-scale JavaScript application, so as long as you know what existing tools are out there, you can use it for Backbone as well as anything else.