Jest setup "SyntaxError: Unexpected token export" since the upgrade to 3.0.3

[jogelin]

I'm submitting a...

[X] Regression (a behavior that used to work and stopped working in a new release)

Current behavior

When upgrading from 3.0.2 to version 3.0.3, I have an error in my Jest tests related to components using the dirty-check-library.

In fact, now the library is using lodash-es that is exposing esm module not recognized by Jest.

Expected behavior

Using a new MINOR version instead of the PATCH version when upgrading a library.

[jogelin]

Solution

Ignore the lodash-es library in your Jest config:

{
...
    transformIgnorePatterns: [`<rootDir>/node_modules/(?!.*\\.mjs$|lodash-es)`],
...
}

More details: https://stackoverflow.com/questions/42260218/jest-setup-syntaxerror-unexpected-token-export