after writing this wiki article. It’s almost my duty to request support of PHPUnit_story in future versions of Yii. It should be as easy as moving classes I posted on wiki to test directory of framework and updating yiit.php with applicable imports.
PHPUnit’s BDD is deprecated in 3.5, in deference to its alternative, Behat.
I coulden’t get it working under 3.5. It’s working out of the box under 3.6.
I just read Sebastian’s comment. Thanks for info.