Enzyme still trigger a render when null is returned from setState

[samouss]

Current behavior

Not sure if it's an issue or a non documented behaviour (or I didn't found it). With shallow when we return null from an updater function, React prevent the render. But Enzyme don't.

There is no issue with mount.

Expected behavior

Enzyme should prevent the render when we return null from an updater function.

Your environment

Here is an example.

API

• shallow

Version

library	version
Enzyme	^3.3.0
React	^16.3.2

Adapter

• enzyme-adapter-react-16

[koba04]

I think this is an issue of React so I've created a PR to fix this. facebook/react#12756

[koba04]

Fixed by facebook/react#12756

[samouss]

Thanks!