Documentation for jest.setup.js

[misbell]

Describe the bug

you're referring to the wrong library!!!

Wasted a whole DAY on this. jest-native here, not react-native. PLEASE FIX THIS.

This is hard enough without adding the documentation written by the authors misleading you!

[mdjastrzebski]

@misbell not sure what's your point here. The provided information is correct and refers to the current version of RNTL.

• @testing-library/jest-native is the old solution and is now deprecated and not officially supported by RNTL.
• @testing-library/reatct-native/extend-expect import is the recommended one and officially supported way of adding Jest matchers since RNTL v12.4. If it does not work for you then you might be using older version of RNTL, in such case I would recommend to upgrade your RNTL version.

You can read more here: https://callstack.github.io/react-native-testing-library/docs/api/jest-matchers

[SashaPltnchnk]

I'm facing a similar issue: Cannot find module '@testing-library/react-native/extend-expect' from 'jest-setup.js'. I have @testing-library/react-native 13.0.1

[mdjastrzebski]

@SashaPltnchnk TLDR From RNTL v13, it's no longer necessary to import '@testing-library/react-native/extend-expect. It's done automatically for you if you just use RNTL in your tests.

See v13 migration guide and v13 Jest matchers docs.