Loading collection data...
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 test is good but the log is not clear: you return 10, and the test wants 12. So 10 != 12, which is wrong. Revise your code :)
A clearer log would be:
expected 12, instead got 10This is "YES", all tickets can be selled!
The test is ok, your code is wrong. Read the posts below. Think how you give back the change.