capacitor-community / fcm

Enable Firebase Cloud Messaging for Capacitor apps

Home Page:https://capacitor.ionicframework.com/docs/

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Jest failed to parse a file

Paddy-Hamilton opened this issue · comments

Describe the bug
When running a basic jest test on the component that import { FCM } from '@capacitor-community/fcm'; I get the following error

Jest encountered an unexpected token

    Jest failed to parse a file. This happens e.g. when your code or its dependencies use non-standard JavaScript syntax, or when Jest is not configured to support such syntax.

    Out of the box Jest supports Babel, which will be used to transform your files into valid JS based on your Babel configuration.

    By default "node_modules" folder is ignored by transformers.

    Here's what you can do:
     • If you are trying to use ECMAScript Modules, see https://jestjs.io/docs/ecmascript-modules for how to enable it.
     • 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/configuration
    For information about custom transformations, see:
    https://jestjs.io/docs/code-transformation

    Details:

    /home/paddy/sites/app/client/node_modules/@capacitor-community/fcm/dist/esm/index.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import { registerPlugin } from "@capacitor/core";
                                                                                      ^^^^^^

    SyntaxError: Cannot use import statement outside a module

Additional context

Ionic:

Ionic Core : 5.6.11
Ionic Framework : @ionic/react 5.6.11

Capacitor:

Capacitor CLI : 3.1.1
@capacitor/core : 3.1.1

System:

NodeJS : v14.18.1
npm : 6.14.15

I can see a similar issue related to ESM file parsing here capacitor-community/http#29

But the suggestion capacitor-community/http#29 (comment)
to update the transformIgnorePatterns doesn't seem to be working here

jest.config

module.exports = {
...
  transformIgnorePatterns: ['node_modules/(?!capacitor-community).+\\.js$'],
...
};

Same here
Any workarounds?