[BUG] Jest error "SyntaxError: Cannot use import statement outside a module"

[freirepaulo]

Are you using the latest version of this library?

• [X] I verified that the issue exists in the latest next-safe-action release

Is there an existing issue for this?

• [X] I have searched the existing issues and found nothing that matches

Describe the bug

First of all, I would like to thank you for the excellent work you have been doing with this library. However, I am facing an issue in my new project.

When I try to run my tests (just a simple test), it returns this error within the dist of safe-action. I noticed that a similar issue was opened in the past and resolved, but the problem seems to have returned:

These are the dependencies I am using:

Reproduction steps

1. add the library
2. try to run a base unit test

is also important to say that the page.tsx is a server component and the SearchArea.tsx is a client component.

this the unit test that is breaking:

Expected behavior

the test should pass

Minimal reproduction example

private repo

Operating System

macOS

Library version

7.8.0

Next.js version

14.2.5

Node.js version

21.7.3

Additional context

No response

[TheEdoRan]

Hi, please set up a public repo or a CodeSandbox project with a minimal reproduction of the issue so I can investigate the problem, thanks.

[freirepaulo]

@TheEdoRan https://github.com/freirepaulo/next-safe-action public repo that has the issue - to reproduce is just checkout on the main branch > run yarn > yarn test

[freirepaulo]

If I change all the imports and exports in the hook.mjs and index.mjs resolves the problem, but I don't know what will impact the library structure....

[TheEdoRan]

Thank you for providing the repro. I solved the issue on my end by setting this option in next.config.mjs:

const nextConfig = {
+  transpilePackages: ["next-safe-action"],
};

Vitest should be a better testing framework though, if you can switch to it. Let me know if setting that option fixes the issue for you as well, thanks!