Move tests to GitHub Actions, add Windows Tests

[karlhorky]

From #124:

karlhorky: what do you think about adding Windows end-to-end tests to install-peerdeps? To catch any errors like this in the future? GitHub Actions and seemingly also Travis CI have the ability to run on Windows...

nathanleung: I think that's a great idea — don't want to break this package for Windows users in the future if I don't have to.

ljharb: travis-ci is slow and dying; i'd suggest github actions. I can convert the existing tests to github actions if @nathanhleung is OK with that; windows tests can go in separately/in parallel as a separate workflow.

nathanleung: It would be awesome if you could do that, thanks!

karlhorky: Cool, if this is the way to go, maybe that could be done with a matrix - here's our approach for Preflight: https://github.com/upleveled/preflight/blob/main/.github/workflows/build-lint-test.yml#L7-L10

cc @ljharb @nathanhleung

[ljharb]

I'll make a PR soon that converts the tests to GH.

[nathanhleung]

I'll make a PR soon that converts the tests to GH.

Thank you!

[karlhorky]

Hey @ljharb I guess no time to work on this one yet, right?

Would really like to have some failing tests so that we can iron out the Windows dependency problems here, which are not very visible to many users probably, but can cause big issues dependency versions (facebook/create-react-app#10465 (comment)).

Originally I thought that #126 fixed the issue, but after checking again, I've found incorrect versions are still getting installed on Windows - see my comment.

[ljharb]

No, I haven't had time yet, unfortunately. However, I've recently made some updates to my shared actions that should make the job much easier :-) I'll plan to take a crack at it today.

[ljharb]

Got a branch in progress; looks like some tests are failing tho (which were passing on master 2 months ago).

[ljharb]

Put up the PR: #139. Some help debugging the pnpm failures would be appreciated.

[karlhorky]

Nice, thanks! I'll try to get some time to take a look soon! Maybe we can make a test case for this eslint-config-react-app issue (either as part of this or in a followup PR)

[ljharb]

I'd like to get the tests migrated off travis first; after which extending them with more cases, or on more platforms, would be great.

[karlhorky]

Great, now that #139 has been merged, we just have:

1. Add Windows tests
2. Add test for eslint-config-react-app to test situations like yarn start throws error message after installing eslint-config-react-app facebook/create-react-app#10465

[karlhorky]

@ljharb do you think you'll have time in the next weeks / months to add Windows tests?

Would be great to get these tests so that the ERR undefined issue on Windows can finally be reproduced, investigated and fixed (issues #228, #193, #150, #128)