Should not it contain random tests?

I see that someone has approved this.

It doesn't treat Johnny a bit more special. Might want to fix the last test.

Don't require/assert anything. The description isn't overly clear (I opened an issue) and the error is horribly unclear, but you should simply do nothing when there are insufficient funds. Your require() is causing the problem.

If you insist that 'invalid-inPutBad' is bad input, then the description of this Kata must change to "validate and convert" between the various types.

Approved.

Already approved, closing

"this-is_id", thisIs_id and this-isId are all considered invalid, because all of them have more than one case type.

While because 'invalid-inPut_bad' has two cases kebab and snake which is considered invalid in this kata, that is why you need to return undefined

not an issue. Read the description again... ;)