Jest fails to load files for version 2 #16
Description
Hi,
I am using a react app with create-react-app using Typescript including Jest to run some unit tests with @testing-library/react that includes components that use "react-extras".
When updating the version of react extras from 1.0.1 to 2.0.0, I encountered the issue:
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
Details:
C:\rtc\products\ev_main\weert\prod\Anywhere\node_modules\react-extras\dist\index.js:1
({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){export { default as autoBind } from 'auto-bind/react';
^^^^^^
SyntaxError: Unexpected token 'export'
4 | import { Trans } from "react-i18next";
5 | import { FormLabelStyle } from "../../Theming/UserFormStyles";
> 6 | import { If } from "react-extras";
| ^
7 |
8 | interface CubusUserFormGroupProps {
9 | labelI18nKey?: string;
at ScriptTransformer._transformAndBuildScript (node_modules/@jest/transform/build/ScriptTransformer.js:537:17)
at ScriptTransformer.transform (node_modules/@jest/transform/build/ScriptTransformer.js:579:25)
at Object.<anonymous> (src/Utilities/UserForms/CubusUserFormGroup.tsx:6:1)
Node version: 12.16.1
My first assumption would be that it is related to the change "Output build as ESM module (#14)", but honestly I don't know too much about it. Do I need to apply some custom transformation to it as suggested by the hint?