Test suite failed to run error: Expected ';', '}' or <eof>

[Brysonmk1984]

I just tried switching to this package instead of ts-jest since it was so slow at handling errors. I get this error on any test I run... I'm assuming I didn't configure this properly. Any ideas? Do I need to set up a .swcrc file? if so, what goes in there?

Thanks for your work on this.

[therynamo]

Do I need to set up a .swcrc file?

Yes - that or inline it like the README implicitly suggests: https://github.com/swc-project/jest#usage

module.exports = {
  transform: {
    '^.+\\.(t|j)sx?$': ['@swc/jest', { ...config, /* custom configuration in Jest */ }], //.swcrc contents go here in place of `config`
  },
}

---

I am also here because of the recent ts-jest issues https://github.com/kulshekhar/ts-jest/issues/1967 (Granted it could be Jest it could be v8. Ultimately - I just wanted to move to SWC to get faster, more stable, and ultimately most performant tests I can run).

I am trying to use this package with a React Native app - and am running into issues after I resolve the one listed here. I resolved this issue you've outlined by adding an .swcrc. I have tried a couple of different .swcrc configurations:

• This one
• This one

And just a basic one from the example in the repo here: https://github.com/swc-project/jest/blob/466035925e289e6a6cc747ff7939a63c8a94c7a2/examples/react/package.json#L33-L51

The above works without a physical .swcrc file - which is what I'll opt for since our App wont be built using SWC yet (or maybe ever 🤷 Depends on the RN support in the future.)

The issue I'm running into now - is very similar:

 FAIL  MyApp/x/y/z.spec.tsx
  ● Test suite failed to run

    error: Expected ',', got ':'

       |
    51 |   applyWithGuard<TArgs: $ReadOnlyArray<mixed>, TOut>(
       |                       ^



    Caused by:
        0: failed to process js file
        1: Syntax Error

      at Compiler.transformSync (node_modules/@swc/core/index.js:137:25)
      at transformSync (node_modules/@swc/core/index.js:217:21)
      at Object.process (node_modules/@swc/jest/index.js:55:45)
      at ScriptTransformer.transformSource (node_modules/@jest/transform/build/ScriptTransformer.js:612:31)
      at ScriptTransformer._transformAndBuildScript (node_modules/@jest/transform/build/ScriptTransformer.js:758:40)
      at ScriptTransformer.transform (node_modules/@jest/transform/build/ScriptTransformer.js:815:19)

I haven't had any luck getting past this point and would LOVE some help troubleshooting how to move forward.

EDIT: I'll make a separate issue so this question doesn't muddy up your question. Hope this answer helped though. https://github.com/swc-project/jest/issues/85