`import`ing `RNQRGenerator` fails in `detox` e2e tests (which uses `jest`)

[timmyjose]

Q. Is this library usable in jest tests?

Setup: I have a React Native app (expo) with e2e testing using the detox library (which uses jest internally).

Scenario: When I try to import RNQRGenerator (using import and/or require) from inside a test file, I get the following error:

13:34:19.398 detox[7863] B jest --config e2e/jest.config.js e2e/qrCodeScreen.test.ts
 FAIL  e2e/qrCodeScreen.test.ts
  ● Test suite failed to run

    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.
     • If you are trying to use TypeScript, see https://jestjs.io/docs/getting-started#using-typescript
     • 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:

    /Volumes/ExtDisk1/learning/docker/e2e-testing-demo/app/node_modules/rn-qr-generator/index.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,jest){import {NativeModules, Platform, processColor} from 'react-native';
                                                                                      ^^^^^^

    SyntaxError: Cannot use import statement outside a module

      3 | import { swipeIntros } from './swipeIntroSlider'
      4 | import { getText, VISUAL_ELEMENTS_TIMEOUT } from '../components/helpers'
    > 5 | import RNQRGenerator from 'rn-qr-generator'
        | ^
      6 |
      7 | describe('QR Code Screen', () => {
      8 |   beforeAll(async () => {

      at Runtime.createScriptFromCode (../../node_modules/jest-runtime/build/index.js:1505:14)
      at Object.<anonymous> (e2e/qrCodeScreen.test.ts:5:1)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        5.997 s
Ran all test suites matching /e2e\/qrCodeScreen.test.ts/i.
13:34:26.158 detox[7863] E Command failed with exit code = 1:
jest --config e2e/jest.config.js e2e/qrCodeScreen.test.ts

I can import other libraries in test files (like axios) without any issues.

I can provide more context, if needed.