its tow different tests i added 1's that will be easyier to see

This is not what your code returns for this input. This is really weird. I suspect you may have changed something without realizing it. Your code fails on multiple examples, you should focus on solving sample tests correctly first.

for vKnightLeft = 1, vKnightRight = 1 and field:
["$->1111","1111
<-P"]
: expected [ '11$->11', '11<-P11' ] to deeply equal [ '1$->111', '111<-P1' ]

for vKnightLeft = 1, vKnightRight = 1 and field:
["$->11111","11111<-P"]
: expected [ '1$->1111', '1111<-P1' ] to deeply equal [ '11$->111', '111<-P11' ]
i dont understand why these tow exaples are different?

Your solution, for some reason, returns undefined, and this confuses tests.
To avoid this error, make sure your solution always returns something.

TypeError: Cannot read property 'sort' of undefined
and my solution runs good at vscode

Do you know what 890625n is?
Do you know what big integers are in JS?

EDIT: OH I am stupid, and the kata is Ruby only.

how do i solve this ? expected '890625n' to equal 890625n