Update to Jest 19

[gaearon]

Seems like a pretty sweet release: http://facebook.github.io/jest/blog/2017/02/21/jest-19-immersive-watch-mode-test-platform-improvements.html.

This is a breaking change so targeting 0.10. A PR to update is welcome.
Also worth keeping an eye on jestjs/jest#2957.

[rogeliog]

I'm happy to do the update

[gaearon]

Sounds good!

[TobiasBales]

Any news on this?
Update: just saw the pr and noticed the let's hold off until x and y are fixed list, oh well

[gaearon]

You can help fixing them. 😉
I think those are pretty important blockers and we shouldn't ship this to CRA audience.

For the reference:

• Watch mode test pattern is global but it isn't quite obvious jestjs/jest#2978
• Watch mode crashes with ProcessTerminatedError in new test pattern mode jestjs/jest#2979

[biot023]

Hi -- it looks like jest is pretty much broken with the current CRA release.
I'm getting a TypeError: Cannot read property of 'bind' of undefined error.
Googling it brings this up: jestjs/jest#3114
I'm rather new to the entire react/jest/yarn/etc. ecosystem, so sorry if I'm getting this wrong.
Is there some way I can update jest for my local app? I've tried updating jest-cli and jest to the latest versions, but I get the same error and can still see references to 1.8 versions in the yarn.lock file.
Cheers,
Doug.

[Timer]

Hey! You don't need to install any jest packages for it to work with CRA.
Unfortunately, this also means you can't upgrade Jest until we do in the 0.10 release.

Please uninstall all jest related packages and try npm test again.

(this all assumes you haven't ejected)

[biot023]

Hi -- I haven't ejected, so that should be okay.
So I should yarn uninstall jest jest-cli, as they are the only two packages mentioned in my packages.json file?
I'll give that a try -- thankyou!

[biot023]

Bingo! I must have tried a manual install of jest (I don't remember doing it, but I must have) and that screwed things up -- thankyou so much! :)

[gaearon]

No worries! If you remember why you tried to do it (e.g. a confusing guide) let us know!

[biot023]

I think I just assumed I needed to add it explicitly -- so more a case of not reading the guide properly, as opposed to being confused by it.

[ndelangen]

I'm getting this as well in react-storybook: #1604 (comment)

In our case we're using lerna with hoisting and somehow this is causing problems in a create-react-app + storybook example:

lerna ERR! test Errored while running script in 'cra-storybook'
lerna ERR! execute Error: Command failed: npm run test
lerna ERR! execute  FAIL  src/App.test.js
lerna ERR! execute   ● Test suite failed to run
lerna ERR! execute 
lerna ERR! execute     TypeError: Cannot read property 'bind' of undefined
lerna ERR! execute       
lerna ERR! execute       at Runtime._createRuntimeFor (../../node_modules/react-scripts/node_modules/jest-runtime/build/index.js:709:52)
lerna ERR! execute       at process._tickCallback (internal/process/next_tick.js:109:7)
lerna ERR! execute 
lerna ERR! execute Test Suites: 1 failed, 1 total
lerna ERR! execute Tests:       0 total
lerna ERR! execute Snapshots:   0 total
lerna ERR! execute Time:        0.906s
lerna ERR! execute Ran all test suites.

Full log here: https://travis-ci.org/storybooks/storybook/builds/226783695#L2102

For now I have disabled lerna hoisting and it appears this resolves the issue.

[gaearon]

Please help beta test the new version that includes this change!
#2172