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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.
There might not be any example tests but there are always real tests.
In this case, just submit the solution and don't bother with sample tests (or you can write you own there).