No jest tests are working @#cra

[fix-me]

Having the latest versions installed, npm install + npm test work perfectly on create-react-app consuming a create-react-library from artifactory,
unfortunately pnpm does not!

Here is what comes using pnpm (no problems with npm here):

import { computed, decorate, observable } from "mobx";
           ^

    SyntaxError: Unexpected token {

 [..................]

  ● Test suite failed to run

    Jest encountered an unexpected token

    This usually means that you are trying to import a file which Jest cannot parse, e.g. it's not plain JavaScript.

    By default, if Jest sees a Babel config, it will use that to transform your files, ignoring "node_modules".

    Here's what you can do:
     • To have some of your "node_modules" files transformed, you can specify a custom "transformIgnorePatterns" in your config.
     • If you need a custom transformation specify a "transform" option in your config.
     • If you simply want to mock your non-JS modules (e.g. binary assets) you can stub them out with the "moduleNameMapper" config option.

    You'll find more details and examples of these config options in the docs:
    https://jestjs.io/docs/en/configuration.html

It seems that some babel transformers do not work or behave different than with npm.

<()nmts<

[jofravelo]

I have the same problem, but in my case it's linked to the paths added in transformIgnorePatterns, in jest.config.js, that are not rightly resolved. It stopped working after starting to use pnpm with no change on either code or config.

I suspect it's due to the fact that pnpm uses "symbolic links" in node_modules and then folders are not "physically" there. Apparently, that's a problem for Jest (or Babel?) when resolving paths.

[jofravelo]

At the end solved the issue using this solution: jestjs/jest#2081 (comment)

It turns out it's rather linked to the folder structure. Even when I used --shamefully-hoist when installing dependencies, apparently it's not flat enough for some :)

[fireairforce]

I meet the same question... but my regex seems not work..

[juanpicado]

🤔 ... how are you exactly installing CRA with pnpm? I'd like to reproduce it.

[zkochan]

If it is still an issue, use the node-linker=hoisted setting.