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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.
You need to check argument rank in incProgress(int rank), if rank == 0, > 8 or < -8 throw IllegalArgumentException
After applying rank of -1 the progress was expected to be 21, but was actually 20 expected:<21> but was:<20>. What does he want from me? I use incProgress(-1) but progress must be 90