Vitest fails to import under Vite App

[FossPrime]

Describe the bug

I'd like to use the same syntax for my client side assertions as my build time testing framework. Unfortunately, Vite seems to load Node.js dependent code when you import Vitest. Is Vitest not compatible with browsers?

ERROR: No matching export in "browser-external:fs" for import "existsSync"

I'm using v0.8.4: https://unpkg.com/browse/[email protected]/package.json

Reproduction

https://stackblitz.com/edit/vitest-dev-vitest-6undtu?file=src%2Fmain.ts&initialPath=__vitest__

System Info

StackBlitz
Vite: 2.9.0

Used Package Manager

npm

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[sheremet-va]

Vitest cannot run in a browser at the moment, but there is a PR that allows a fraction of Vitest functionality to be used in a browser: #891

We are recommending using cypress for testing in browser right now.

[FossPrime]

Ended up using straight up chai/expect. Pretty sure cypress will not run in the browser due to the dependency of a browser.