ci: add jest-junit

[SimenB]

Summary

In theory should give us a nice dash of test status: https://circleci.com/docs/2.0/collect-test-data/#jest

Test plan

Take a look at fancy dashboard?

[SimenB]

Sorta ref #3536

[SimenB]

Huh, didn't work. Maybe https://circleci.com/docs/2.0/configuration-reference/#store_test_results?

I'll look into it tomorrow or something, sleep time now

[codecov-io]

Codecov Report

Merging #6322 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #6322   +/-   ##
=======================================
  Coverage   63.89%   63.89%           
=======================================
  Files         228      228           
  Lines        8705     8705           
  Branches        3        3           
=======================================
  Hits         5562     5562           
  Misses       3142     3142           
  Partials        1        1

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[cpojer]

lol, love how there is documentation for how to use Jest that we are using on.. Jest.

[aaronabramov]

if that works that'll be my new favorite feature!

[SimenB]

Should do the same for eslint, I guess: https://www.viget.com/articles/using-junit-on-circleci-2-0-with-jest-and-eslint/

maybe even flow? idk if they have a junit report

[palmerj3]

@SimenB it looks like perhaps circle-ci's docs are not correct for the jest section? In the store_test_results section it shows that the xml file needs to be named results.xml. So perhaps if you rename it from js-test-results.xml to results.xml it will pick it up.

[SimenB]

https://circleci.com/build-insights/gh/facebook/jest/master

I guess that last one will be populated once we merge this to master

[github-actions]

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