Good answer.

Mozzila documentation state this: Deprecated: This feature is no longer recommended.

Reraise issue, random tests should contain not only single letters.

There's random tests

lack random tests

OP solved it, closing

Of course. It is way more important for a Kata to teach best practices, than to maintain so-called "backwards compatibility".

If you want to maintain backwards compatibility, just do something like this in the test suite:

const userSolution = typeof uniqC === 'function' ? uniqC : uniq_c;

Then invoke the user solution as userSolution.

Got you

Maybe

That would invalidate all the solutions. Is that okay?

Added

Fixed

Added

Fixed

If it got re-ranked to 7 Kyu, you'll probably say "it should be 8" xD