Update testMatch to also be compatible with Jest 24

[ngbrown]

For people who try to use Jest 24, there is a different version of micromatch and it behaves differently. These changes should make it behave the same before and after changing Jest versions.

Without this change, Jest 24 will come up with no files to test.

I tested with npm run test -- --listTests on two projects, one with the default Jest 23 and another with the new Jest 24. In addition to numerous normally named test files had some special case files like src/.test.js, src/test.js, and src/somethingtest.js. Only the first two matched and the third one didn't; both pre-, and post- this change.

[facebook-github-bot]

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have you on file. In order for us to review and merge your code, please sign up at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need the corporate CLA signed.

If you have received this in error or have any questions, please contact us at cla@fb.com. Thanks!

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Facebook open source project. Thanks!

[mrmckeb]

Hi @ngbrown, thanks for that. I think this change should be accompanied by a move to Jest 24... but I agree it's necessary for that. Let's hold off until that time, if that's OK?

[ngbrown]

I submitted this separate because Jest 24 isn't quite ready (jestjs/jest#7707) to be pulled into create-react-app. Because Jest 24 has better support for TypeScript people might want to try it out. Since this is one of the first things they will run into, it might as well be fixed for everyone.

Being able to merge now is why I made sure the new pattern would work equivalently in the older micromatch.

[SimenB]

If jest 24 is blocked until a new major, it'd be a good idea to land this in the meantime

[stale]

This pull request has been automatically marked as stale because it has not had any recent activity. It will be closed in 5 days if no further activity occurs.

[ianschmitz]

I'm not sure this is still needed as we've landed Jest 24 and from my quick tests it seems to be working okay.

@SimenB can you advise? Should we make this change?

[SimenB]

If you've tested on windows and it works, this shouldn't be needed

[dalcib]

I tested CRA version 3.0.0-next.b0cbf2ca on windows, and it is not detecting any tests.
This PR solves the problem.