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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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The conditional describe block doesn't appear to be working in JS, even running in a fork where I can clearly see the code for it is present it does not show up.
Don't round float results, use approximate equality tests.
https://docs.codewars.com/authoring/recipes/floating-point
Description should be language-agnostic
Python, JS, Java, C++, and maybe others: float values for radius are only tested in fixed tests (just once in JS, Python and Java), random tests only give integer values (or double with no decimal part in typed languages). It doesn't make sense.