Function wrapAsyncTest

packages/zone.js/test/zone-spec/async-test.spec.ts:461–473

(fn: Function, doneFn?: Function)

  const asyncTest: any = (Zone as any)[Zone.__symbol__('asyncTest')];

  function wrapAsyncTest(fn: Function, doneFn?: Function) {
    return function (this: unknown, done: Function) {
      const asyncWrapper = asyncTest(fn);
      return asyncWrapper.apply(this, [
        function (this: unknown) {
          if (doneFn) {
            doneFn();
          }
          return done.apply(this, arguments);
        },
      ]);
    };
  }

  describe('async', () => {
    describe('non zone aware async task in promise should be detected', () => {