Create-react-app: Adding enzyme to React 16+ requires you to eject because you can't configure Jest further

[wldcordeiro]

Is this a bug report?

Nope

Which terms did you search for in User Guide?

Enzyme

Environment

1. node -v: 8.4.0
2. npm -v:
3. yarn --version (if you use Yarn): 1.2.0
4. npm ls react-scripts (if you haven’t ejected): 1.0.14

Then, specify:

1. Operating system: OS X
2. Browser and version (if relevant):

Expected Behavior

You can get a basic Enzyme setup without having to eject.

Actual Behavior

Adding enzyme to React 16+ requires you to eject because you can't configure Jest further to get enzyme's adapters setup.

[gaearon]

you can't configure Jest further to get enzyme's adapters setup.

This is not correct. CRA has always supported running some code before every test:

https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#initializing-test-environment

Here is an example of working setup:

https://github.com/facebookincubator/create-react-app/issues/3199#issuecomment-334801311

Somebody should send a PR to Enzyme to document usage with CRA, and update our docs as well.

[gaearon]

I filed an issue for updating the docs.
https://github.com/facebookincubator/create-react-app/issues/3272