`ERR_UNSUPPORTED_DIR_IMPORT` or `EISDIR` with `vitest`

[andreialecu]

Describe the bug

It appears that when using vitest via https://analogjs.org/docs/features/testing/vitest the test suite will run into bizarre issues due to the way this library imports @apollo/client/core.

I'm not sure if it's a bug in this library or in vite/vitest. I also opened a bug report on their side:
vitejs/vite#15795

To Reproduce

Repro at: https://stackblitz.com/~/edit/vitest-dev-vitest-djnid1?initialPath=/__vitest__/

Expected behavior

No error

[andreialecu]

It appears the "correct" way is to change all the imports to @apollo/client/core/index.js as per: apollographql/apollo-client#11570 (comment)

[JesseZomer]

any way around this? I'm migrating from jest to vitest but running into this issue as soon as use an 'apollo-angular' import

edit: found a workaround here: vitejs/vite#15795 (comment). I placed the import '@angular/compiler'; line in a global setup file and that seems to work

[PowerKiKi]

@JesseZomer you can help solve this issue properly by continuing the work started in #2307

[phryneas]

Or you wait a few more weeks ;) Once we release AC 4.0 this won't be a problem anymore.
We're planning the RC next week and the release end of July.