Groovy Translation (It doesn't use regex)

my answer was NOTHING like the common answer

The kata is labelled with Regex, and you chose to avoid it :P

in what world are people entering PINs like -1.234?

That's literally the point of this exercise: to validate the inputs. In the context of ATMs maybe it's not so accurate (probably impossible), but from 3rd example in description it should be clear that theoretically any data could be in input.

I do not believe this is 7kyu

It seems fine for 7kyu, especially if you use regex.

I do not believe this is 7kyu and my answer was NOTHING like the common answer. Also, this example is very strange because in what world are people entering PINs like -1.234?

It was implemented correctly, your code just needs to check whether it has \n.

getting the same error, the tests of the creator were not well implemented

This might help

"-1-234"

is this legal?
it is 4 digits[-1,-2,3,4]
Also it has 6 characters.

You are absolutely right.
I going to adjust my approach. Thank you.

C#: Notice the linebreak in the assertion message, Your code works incorrectly for inputs like "1234\n".

Test Failed
  Wrong output for "1234
"
  Expected: False
  But was:  True

(Resolving: Not a kata issue)

Test Failed
Wrong output for "1234"
Expected: False
But was: True

This is wrong, It should expect True not False

Oh thanks I didnt know that $ can successfully match a final newline.

The input is "1234\n". I can;t remember exactly how it works in Java, but in some implementations, $ can successfully match a final newline, resulting in wrong answers for this challenge.

Ok thanks you ! I don't see the return to line. Sorry !