I would have implemented your   suggestion but you cant change tests when more than 500 people have completed it. I do really appreciate feedback but dont you think saying, hey man, thanks for tha kata, I was struggling with seeing what went wrong with my tests when they failed, could you maybe please somehow print out the input data is better than I think the test description is bad? Learn how to have more respect when you complete someones work that they have done for a community for free at his own expense and time.

So you know how to print out and see all input data, you just want me to do it for you?

You can do console.log to print out the args then you can see input data.

Any suggestions on how to improve it? Or do you like to just criticize without contributing anything?