New: support JSX fragments (fixes #503)

[wsabransky]

No description provided.

[jsf-clabot]

All committers have signed the CLA.

[j-f1]

Can you add some tests for this?

[wsabransky]

@j-f1 done!

[JamesHenry]

Thanks, @wsabransky!

[JamesHenry]

Your test fixtures have not been picked up (you can tell because there were no changes to the jest snapshots).

You need to make sure you files end in .src.js like the other ones

[wsabransky]

@JamesHenry Thanks, updated snapshots.

There is a disagreement between the TSEP and Babylon parser with the fragment fixtures. I tried upgrading babylon to @babel/parser but it didn't fix the problem. How would you like me to proceed?

[JamesHenry]

Hi @wsabransky, I apologise for the inconvenience, but please could reopen this PR over here: https://github.com/JamesHenry/typescript-estree

The core parsing logic is now its own freestanding project. At the moment that project is identical to what this one used to be, so it should be very straightforward for you to port it over.

In terms of the babylon case, you can implement an ignore for your specs, check out the fixtures-to-test.js file (in the typescript-estree repo) for how that is done for other such cases right now.

Thanks again!