I like this idea but I'm curious how others would implement it. Does the developer have to write the failing test themselves? Are they instructed to do it first

I like this idea but I'm curious how others would implement it. Does the developer have to write the failing test themselves? Are they instructed to do it first, or is that behaviour worthy of bonus points? (Most write a passing test afterwards, which is worse). > I’ve seen candidates wield their text editor like it was an extension of their fingertips. So am I allowed to install my own text editor and other tools (Emacs with my own config that requires some build time)? Or is it on my own laptop (I don't have one)? It seems unfair if some candidates get to use their favourite tools and others don't.