Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
undefined is not a string, and if undefined (or any other invalid input) was passed it should be stated in the instructions. Let's leave it as it is.
Yes, me too - sample tests crash for me as well.