Function guard4

packages/router/test/integration/guards.spec.ts:2500–2504

()

          tap(() => guardDone.push('guard3')),
        );
      const guard4: CanActivateFn = () =>
        of(true).pipe(
          switchMap((v) => new Promise((r) => setTimeout(r, 6)).then(() => v)),
          tap(() => guardDone.push('guard4')),
        );
      const router = TestBed.inject(Router);
      router.resetConfig([
        {