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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.
the expected and actual are the wrong way round in the assert. this gives an incorrect error message
Random Tests are non deterministic, so should never be a part of a repeatable test set.
If you create random tests, the very least it should show is why it fails.
The reason it failed for me is that I was following the instructions for a string format of "MMMM d, yyyy", but the random tests had a date format of "MMMM d yyyy", i.e. the comma was missing. It was only by deviating from the instructions that the tests would pass.