Well I cloned the repo and cannot generate this battle test by following the instructions. It appears a file called dex.js that is required is not present among other things as well as other suspicious wrong things for what appears to be on the surface a well organized project.
I'm very suspicious of such projects so take it for what you will, but I don't have time to debug some toy project so if it was presented as complete but the instructions don't work it's a red flag for the increasingly AI slop internet to me. I'm saying I think they may have used one simple trick called lying.