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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.
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I have reconsidered everything you mentioned, thank you for the valuable comments.
In this case I would like to show that if I am on the 3rd floor and touch the button 1, the elevator will go to the 1st floor.
I know it smells a little, so I promise I will reconsider the form of the tests.
there are only 4 levels, including the floor(0,1,2,3). So there is no level 4, the test for touching the button 4 is a good example for erronous input. This is the reason I included it in the Kata.