It's considered better to not use Matchers in favour of assertResult, this allows the giving of custom clues to the user as well as a better default debug print.

I see no reason to switch to BigInt or Long to be honest, it's an easy task and the description does say 2^31.

Thanks you for you're reply.

I've changed the solution with your changes to hide the details.

The tests and the reference of nthFibo in ref is the way the javascript is done, the one I took as reference for the translation, if something should be changed, could you tell me what?

Two things:

• A solution of def nthFibo(n: Int, a: Int = 0, b: Int = 1) exposes the implementation detail of a and b in the interface.
• The reference solution ref is referencing the submitted method nthFibo.

Interesting: The Haskell version using arbitrary precision integers for the result. I tried the same with the Scala/JVM Integer and the solution could not complete in time.

Int's could be big integers if the tests should be bigger numbers.

New translation for Scala. Review please.

https://www.codewars.com/kumite/637e3e59ef7bb8a35e16a2a8?sel=637e3e59ef7bb8a35e16a2a8

Thanks.

https://www.codewars.com/kumite/637d03e8462774001ff1f4b7?sel=637d03e8462774001ff1f4b7

I've done a traslation for the kata in Scala. Please review.

This is my first translation. I hope someone will approve it.