Emotion: Add toHaveStyleRule to jest-emotion

[fernandofleury]

First of all thanks for the library! I've using and enjoying it a lot lately.

I was wondering if there are any plans to add something like toHaveStyleRule to jest-emotion, something similar to what jest-styled-components have: https://github.com/styled-components/jest-styled-components#usage

I'd like to be able to test the output of style generation instead of just matching it against a snapshot.

Thanks!

[mitchellhamilton]

We're not planning on adding it but we'd happily accept a PR adding it!!

[fernandofleury]

Cool! I'll see how I can help with this then 😄

[danreeves]

@fernandofleury I worked on adding this feature to jest-glamor-react, which jest-emotion is based on. This file should be helpful: https://github.com/kentcdodds/jest-glamor-react/blob/master/src/matchers.js

If you don't get around to it I'd be happy to pick this up

[fernandofleury]

Thanks @danreeves! I'm hoping to pick this during the weekend.

[fernandofleury]

hey @danreeves would you mind picking this one up? 👀

[danreeves]

Sure thing! I'll try and work it in this week

[Ailrun]

I believe this is resolved in #662.
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