feat: Jest 24

[thymikee]

This is a PoC. Jest 24 works without any changes from our side. It added some defaults to TS but we use slightly different ones (e.g. no .tsx).

However, until ts-jest updates, we'll likely need to hold off with the upgrade, because of peer dep warnings.

Fixes #223

[tonivj5]

it's necessary to add it/test.todo support to fix this error: TypeError: it.todo is not a function 👍

[ahnpnl]

it's necessary to add it/test.todo support to fix this error: TypeError: it.todo is not a function

is it to add to zone-patch @thymikee ?

[thymikee]

Yup, it's there. I'll update the PR later today (or feel free to do that for me instead, you can push to this branch)

[FrozenPandaz]

Hi, it seems like development on this has been paused. Can this be prioritized because of the security vulnerability with jest@23.x.x? https://www.npmjs.com/advisories/786.

Are there any blockers?

[ahnpnl]

I don't see any blockers. Only one feature nice to have is it/test.todo support

[ahnpnl]

Just finished reading all and it was merged 🤣

[thymikee]

Released as 7.0.0-alpha.5, please test it and maybe it's time to release a stable already? ;)

[ahnpnl]

Will try immediately 👌

[FrozenPandaz]

maybe it's time to release a stable already? ;)

Looks good to me, was able to integrate into Nx. Looking forward to the stable :)

[ahnpnl]

apart from performance downgraded, I don't see any issues.

[thymikee]

We discuss perf regression here jestjs/jest#8032

If you have anything valuable to add, that would be great!

[ahnpnl]

I think originally the performance was affected by ts-jest already when we switch to ast transformer, jest 24 just adds more on top of it...

[thymikee]

Just to be sure, you're on 24.1, right? We had a caching regression in 24.0 fixed in minor

[ahnpnl]

ya I was on 24.1. In my opinion mainly the performance is caused by ast transformer.

[FrozenPandaz]

Is a stable version blocked by these performance issues?

[thymikee]

Nope, I think we should finally release it :p

[wtho]

👍 from my side

[ahnpnl]

Actually the performance is not so bad. Only the 1st time jest needs to recache things and after that 2nd time all the tests finished with a more less similar amount of time for my work's project comparing to v6