Best testing module for CI

Hi Guys,

We are planning to build a enterprise level web application on CodeIgniter. So we need to implement a proper structure for CI unit testing.

I'm aware of Unit Testing Class of CI and I also went through following libraries which use phpunit
1. fmalk/codeigniter-phpunit
2. http://knollet.com/foostack/
3. https://bitbucket.org/kenjis/my-ciunit

Though I see all of the above mentioned modules have lots of limitation, when it comes to large scale application testing.

Can you guys please recommend me proper module which I can relay on for unit testing.

Thank you