PHPUnit and CodeIgniter

[eluser]toopay[/eluser]
Unit testing is a some of key-part of test-driven development, and indeed its good practice to have covering your database abstraction or application logics, with its pair unit-test file/functions. In fact, its the only way than could keep you "connects" with your "5 years ago" project, for example.

And... CI already have it built in! Unit Testing Class, its good start for you, i believe.