The test example from the documentation throws errors

[tillka]

Description
All my unit tests failed after introducing next-international, so I followed the official documentation to build the custom renderer but this didn't work.

Then I tried out the example test from the documentation and it also fails.

I tried GitHub Copilot and o1 to help me or provide other examples but I couldn't get anything to work.

Can anyone share a working example for testing a component that includes next-international translations?

To Reproduce
Steps to reproduce the behavior:

1. Follow official documentation
2. Install Vitest, Testing-library
3. Run test
4. See error "Error: NextRouter was not mounted. https://nextjs.org/docs/messages/next-router-not-mounted on line 131: const { locale, defaultLocale, locales: nextLocales } = (0, import_router.useRouter)();"

About (please complete the following information):

• next-international version ^1.3.1
• Next.js version 14.2.4 (App Router)