Add automerge-repo-react-hooks tests

[neftaly]

This PR adds tests for useRepo, using jsdom to mock a browser, via vitest.

[neftaly]

I was hoping to use a headless browser, so that we can test polyfills for the web navigation API, unfortunately this part of vitest is still experimental, and will not work until browser test isolation lands.

vitest.config.ts:

test: {
    browser: {
      enabled: true,
      headless: true,
      provider: 'playwright',
      name: 'firefox', // Navigation API only supported in Chrome; check FF polyfill works
    }
}

[neftaly]

This does not work yet, once it does the PR will be ready for review

[neftaly]

add ES module support https://github.com/primus/eventemitter3/releases/tag/5.0.0

[neftaly]

Turns out I needed <RepoContext.Provider> not <RepoContext> -.-

[pvh]

Hey @neftaly, apologies for the delay in getting into this. I think for now we can disable this test in the test runner on the github action server but we'll need to figure out the best way to do that before I can land because it will either crash the tests or leave them hanging if we don't.

[neftaly]

Are you ok with renaming "yarn test" command to "yarn test-hooks"? Or do you want me to add configuration to actions?

[pvh]

ah, that's extremely simple and totally fine by me for a stop-gap

[pvh]

@neftaly I'm going to just do that for you since I don't see a patch yet and it's trivial, then merge. Thank you for this!

[pvh]

Done!

[neftaly]

this should be "test": "vitest run",

[neftaly]

Thanks!
I didn't know the CI would pick up this test, sorry. The tests were running in watcher mode. Changing test command to vitest run will fix this.