How to correctly integrate vitest into react-ts starter template?

[joshas]

I've started new React project using vite and react-ts template. Now came the time to write unit tests, and I am a bit stumped, how to correctly set up vitest on this template? Main source of confusion is that template provides three tsconfig files: tsconfig.json, tsconfig.app.json and tsconfig.node.json. Following tutorial for vitest it seems that all settings should end up in tsconfig.json file, but that does not feel right. During research I stumbled upon article explaining why different tsconfig files are used and at the end I think I should add third config file - tsconfig.test.json. Could someone explain a little better, what is the best solution to integrate vitest in react-ts template? I am writing to vite project discussions, opposed to vitest, because that's where I got the initial react-ts template. Maybe authors have a few tips on unit test integration?