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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.
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Description is kind of hard to read, it also suggests one specific solution.
I believe unit tests should be done separately.
Java unit tests have misplaced expected and actual values - should exchenge places.