
PR https://github.com/angular/angular/pull/37523 failed when trying to use `rxjs delay` operator inside `fakeAsync`, and the reasons are: 1. we need to import `rxjs-fake-async` patch to make the integration work. 2. since in `angular` repo, the bazel target `/tools/testing:node` not using `zone-testing` bundle, instead it load `zone-spec` packages seperately, so it causes one issue which is the `zone.js/testing/fake-async` package is not loaded, we do have a fallback logic under `packages/core/testing` calles `fake_async_fallback`, but the logic is out of date with `fake-async` under `zone.js` package. So this PR, I updated the content of `fake_async_fallback` to make it consistent with `fake-async`. And I will make another PR to try to remove the `fallback` logic. PR Close #37680
Angular
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License: MIT