Jest-preset-angular: Make compatible with jest 23

[floschnell]

When using jest 23.x the package resolver (yarn in my case) will show warning " > [email protected]" has incorrect peer dependency "jest@^22.0.0".
I can still use that new version, I'm unsure if there are any breaking changes or whether we can just loosen those restrictions.

[thymikee]

There were couple of breaking changes in 23, but not affecting this preset too much AFACT. We're waiting for ts-jest to upgrade to 23 though.

[JLHwung]

@thymikee ts-jest has been updated to support jest 23: https://github.com/kulshekhar/ts-jest/commit/52145c71b43b44d5bc05c72fe296d2ee6909a2fc

[ahnpnl]

@JLHwung unfortunately they haven't released their master branch yet.

[davinkevin]

Waiting for this one for my schematics (https://github.com/davinkevin/jest) allowing simple configuration of jest inside of an Angular CLI project with the help of this project

[paulsouche]

I tried to update to jest 23 and I've got an error TypeError Event is not a constructor and indeed global Event is null ? Is it in the couple of breaking changes ? I can't find anything related in Jest Changelog ?

[ahnpnl]

Hi,

Unfortunately we aren't sure about supporting Jest 23 fully because we have a dependency on ts-jest. ts-jest hasn't updated to support Jest 23 yet so we can't test your case now.

[paulsouche]

Thanks @ahnpnl, I found a workaround anyway. I'll keep that in mind for when everything will be ok. Thanks again for the great job on that preset !

[blackholegalaxy]

@paulsouche could you share your solution? We ran into the same issue.

[paulsouche]

@blackholegalaxy Event mock polyfill

class Event {
  preventDefault = jest.fn();
  stopPropagation = jest.fn();
  constructor(meta: any = {}) {
    Object.assign(this, meta);
  }
}

// in your config
global.Event = Event;

[squelix]

ts-jest has been released in version 23.0.0 :)

[thymikee]

Thanks @squelix, already fixed by: https://github.com/thymikee/jest-preset-angular/pull/166

[thymikee]

Just published next tag being v6.0.0-rc.0, feel free to give it a try and later this week I'll release v6 ;)

[blackholegalaxy]

Thanks @thymikee