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 description is not informative at all: "implement a class that should be responsible for...", "implement a class that should have the base functionality of...", "implement the classes that should inherit..." - none of these explain what attributes/methods should be present and their expected behavior.
Your tests are too weak.