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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.
That ELSE 'No' can't be a good practice
SQL code is not concrete poetry
It's like jo ken po.
https://en.wikipedia.org/wiki/Rock%E2%80%93paper%E2%80%93scissors
There are many tests missing in the kata, the test failures do not have any descriptive message and the description of kata may be better.
My solution say that IP '1e0.1e0.1e0.1e0' is valid but it is not. It should exist a test that validates this.
Instructions should mention it expectes an ip with trailing spaces to fail.