expo: [jest-expo] TypeError: Cannot read property 'current' of undefined , ^34.0.0

I just installed a fresh version of React Native using Expo.

npm install -g expo-cli expo init AwesomeProject cd AwesomeProject npm test

but tests fail.

I checked that versions mismatching

Versions installed are:

jest-expo@34.0.0
jest@24.8.0
react-test-renderer@16.9.0
react@16.8.3

react and react-test-renderer minor version are different, so I thought that the problem was that.

I tryed to follow the guide here:

https://docs.expo.io/versions/latest/guides/testing-with-jest/

but using npm i react-test-renderer --save-dev always installed ^16.9 version of react-test-renderer.

So I tryed to force install ^16.8 react-test-renderer version:

npm i react-test-renderer@16.8 --save-dev

that solved the problem, but I think that there is a problem in version packages dependencies

About this issue

Original URL
State: closed
Created 5 years ago
Reactions: 7
Comments: 23 (6 by maintainers)

Commits related to this issue

[jest-expo] Pin react-test-renderer to 16.8.x; bump to 34.0.1 react-test-renderer broke semver in the sense that 16.9.0 doesn't work with react 16.8.3. To fix this, we pin the version of react-test-r... — committed to expo/expo by ide 5 years ago

Most upvoted comments

also needed react-dom@16.8.3 in my case.

Moreover, both react-dom & react-test-renderer needed to be exact versions (--save-exact)

"react": "16.8.3",
"react-dom": "16.8.3",
"react-test-renderer": "16.8.3"

+23

franzmoro on Aug 9, 2019

@Nodirbek3d react-dom & react-test-renderer should to be exact versions (–save-exact) (without ^)

maq0n on Sep 3, 2019

I guess It might occurs due to the expo-cli version. I got this error after upgrading expo-cli to 3.0.9

As a workaround you can downgrade the version to 3.0.8 and try…

Also there are version mismatch between the libraries for react,react-dom and react-test-renderer All needs to be in same version. these version solve my issue. “react”: “16.8.6”, “react-dom”: “16.8.6”, “react-test-renderer”: “16.8.6”,

bikashsahucbnits on Aug 13, 2019

I was getting the error with these versions:

“react”: “16.8.6”, “react-dom”: “16.8.6”, “react-test-renderer”: “^16.8.6”, <<— caret

Removed the caret on react-test-renderer so that all 3 were locked, fixed the issue.

zip184 on Sep 12, 2019