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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.
Check the JUnit version. It should be JUnit4
Why "+9" ?
@dinglemouse it is really nice solution to this Kata. I've come up with 70 lines of code comparing to yours 10