Jest in CodeSandbox 3.0

[gautamarora]

Creating an issue to discuss future features for Jest integration in CodeSandbox...

Jest in CodeSandbox 2.5 - issue | release

• Unit testing
• Mock functions
• Snapshot testing (read only, does not create new snapshots)
• Async runner
• UI - watch mode, show test fail inline in editor, run tests for single suite

Jest in CodeSandbox 3

• Snapshot saving
• Manual mocks
• Jest config
• Code Coverage

Please comment in this issue with more features that should be added to the list.

cc @CompuIves

[gautamarora]

also cc @gillchristian - interested to help with code or ideas? :)

[gillchristian]

Yeah, I just joined Discord, we can talk there 😄

[alexilyaev]

jest.config.js support would be really nice.

[gillchristian]

@alexilyaev indeed, in the Discord I mentioned I'd like to work on it but haven't found the time yet 😬

[rdiazv]

Fake timers 🙏

jest.useFakeTimers is not a function

[the0neWhoKnocks]

Just came across this ticket after commenting on another ticket #692 (comment). There may be issues utilizing enzyme as well.

To clarify, people will have issues running enzyme if they utilize setupTestFrameworkScriptFile like is suggested in the official enzyme docs https://github.com/airbnb/enzyme/blob/master/docs/guides/jest.md#configure-with-jest

[Pyrolistical]

Would have been nicer when I called jest.mock(..) instead of getting TypeError: jest.mock is not a function, I would get a Error: not implemented yet in codesandbox.io, see: https://github.com/CompuIves/codesandbox-client/issues/513

[codialsoftware]

or jest.doMock ;)
I've look through half of half of the Internet to finally find this bug :D

[jdhines]

Would have been nicer when I called jest.mock(..) instead of getting TypeError: jest.mock is not a function, I would get a Error: not implemented yet in codesandbox.io, see: https://github.com/CompuIves/codesandbox-client/issues/513

+1 As local code works fine, the "not a function" error is a bit misleading (to me anyways), as I literally found out about CodeSandbox today (super awesome BTW!) and trying to use it to testdrive react components and jest tests. Not knowing the architecture, I just assumed that if Jest was in the dependencies correctly, I could call any of the jest.x() functions.

[iDVB]

So I've read this thread over 3x and still not sure if this is still an known issue or not.
I continue to get the error...
jest.mock is not a function

There seems to be codesandbox docs about using Jest... but no mention of limitations.
https://codesandbox.io/docs/tests

[dwiyatci]

@iDVB I don't think jest.mock()/"automatic mock" is supported yet. 🤔

How do we check the version of CodeSandbox from the dashboard btw?

[SaraVieira]

@dwiyatci You can check the version in any sandbox here: