My pleasure to help a fellow codewarrior for the little help I can offer :)

Thanks!

Either that or you just hits [Submit] and see if your work passes the complete tests (the ones you can't see, each kata has to have some of them), yeah.

And don't think that is necessarily bad: being able to test and debug is at least as important as being a good designer.

So, i need to write test case by myself?

That is not a bug: some kata (particularly older ones, I think) was simply designed with no example test cases, so that the user could write the testing part too.

Imho it is not the best practice, as the creator can easily put on some test and then let the user modify or increase the number of tests. But definitely not a bug :)

Why in some of my kata "Your Test Cases:" is empty?

http://i.imgur.com/by2M7Cd.png?1