Vitest not working with uwebsockets.js

[chanon]

Describe the bug

Just calling uwebsocket's App() will terminate the test and Vitest will not show results of any tests.

I have tried looking through the Vitest documentation to see what the problem could be, but did not find anything.

Reproduction

Complete minimal reproduction in github repo:
https://github.com/chanon/vitest-uws/

The test code in tests/minimal.test.ts:

import { test } from "vitest"
import { App } from 'uWebSockets.js'

test("test it", async () => {
	try {
		console.log('before App()')
		// try commenting out the App() call
		App()
		console.log('after App()')
	}
	catch (e) {
		console.log(e)
	}
})

Run

pnpm install
pnpm vitest

Result:

Comment App() call and run again.

Result:

System Info

(Relevant info:)

 System:
    OS: Windows 10 
  Binaries:
    Node: 20.9.0
    pnpm: 9.0.4

Used Package Manager

pnpm

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[AriPerkkio]

Tested this on Github Codespaces and it works fine there. Does vitest --pool=forks make this work better on Windows?

[chanon]

Aha! yes. That works. I somehow missed that in the docs.

[AriPerkkio]

The uWebSockets.js seems to be native node addon. Those have some compatibility issues with Vitest's default pool. In the next major we'll be defaulting to pool: 'forks' so that this kind of issues would not come up: #5047