Support jest 27

[ahnpnl]

🚀 Feature Proposal

Adopt ts-jest v27 and jest 27 changes

Notes

• Have to explicitly set testRunner to jest-jasmine2 because jest-circus has issues with asycn done => {} (see [jest-circus] Support both done callback and async test simultaneously jestjs/jest#10529)

• BLOCKER: Jest 27 and JSDOM has issues with node 10 related to globalThis, see globalThis is not defined on Node 10 jsdom/jsdom#2961

[ahnpnl]

Hi @JiaLiPassion , we have issues with zone 10 with jest 27. The error is thrown for async done =>

Error: Test functions cannot both take a 'done' callback and return something. Either use a 'done' callback, or return a promise.
    Returned value: ZoneAwarePromise {
"__zone_symbol__state": true,
"__zone_symbol__value": undefined,
}

Would you please help to check it ? Here is the CI which has the test failed https://github.com/thymikee/jest-preset-angular/pull/676/checks?check_run_id=1570469754

[JiaLiPassion]

@ahnpnl , sure , I will check it.

[ahnpnl]

FYI: The issue is caused by default testRunner in Jest 27 is jest-circus, switch back to jest-jasmine2 the test passed again. I think this information is helpful

[JiaLiPassion]

@ahnpnl , I just checked, I think it is not a zone.js or jest-preset-angular issue.
I created an empty project with single test file.

describe('test fake', () => {
  it('async with done should work', async done => {
    let flag = false;
    setTimeout(() => {
      flag = true;
      expect(flag).toBe(true);
      done();
    }, 100);
  });
});

And use jest 27 to run it, it will throw the same error. So it seems jest-circus not allow to
use done with return something at the same time.
jestjs/jest#10529

[ahnpnl]

I see, thanks a lot 👍 I will set to jest-jasmine2 for now while waiting for Jest to fix it.