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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.
Description has been updated in the meantime.
Wasted quite some time trying to figure out how to pass the error tests.
If I didn't provide an Exception, the tests would demand an Exception.
If I provided an Exception, the tests wouldn't even compile.
Long story short, for Java, you must specifically provide an IllegalArgumentException (in some cases).
If a specific type of exception is required, please put it in the description instead of making us guess, thank you.