Local test cases testing

Hello guys i used to watch neal's youtube videos , and i found that he has some kind of scripts that he uses to test his solution, i think this script is using the API of the website and find the running contest and you choose the current problem so it takes the solution and run it on the cases and tells you how many tests u passes , and fails. _____-
so as a linux user i am asking if anyone has any idea about this script or should i write my own :> thanks.