docs: fix testing example

[kapunahelewong]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• angular.io application / infrastructure changes
• Other... Please describe:

What is the current behavior?

Testing example (the test one - there are two examples), is broken. The tests render the screen as empty bullet points.

Issue Number:
Closes #30939
Closes ##30137

What is the new behavior?

Tests render correctly.

Does this PR introduce a breaking change?

• Yes
• No

Other information

Original fixes from @brandonroberts work. Thanks, Brandon! 🦢

[mary-poppins]

You can preview 4622cf3 at https://pr31120-4622cf3.ngbuilds.io/.

[mary-poppins]

You can preview c5dc439 at https://pr31120-c5dc439.ngbuilds.io/.

[mary-poppins]

You can preview a484f1d at https://pr31120-a484f1d.ngbuilds.io/.

[mary-poppins]

You can preview ae7481f at https://pr31120-ae7481f.ngbuilds.io/.

[brandonroberts]

Not sure why the unrelated http tests are failing all the sudden, but there needs to be types added:

For hero https://github.com/angular/angular/blob/master/aio/content/examples/http/src/app/heroes/heroes.component.ts#L53
For entry https://github.com/angular/angular/blob/master/aio/content/examples/http/src/app/package-search/package-search.service.ts#L51

[mary-poppins]

You can preview 1ba103c at https://pr31120-1ba103c.ngbuilds.io/.

[googlebot]

So there's good news and bad news.

👍 The good news is that everyone that needs to sign a CLA (the pull request submitter and all commit authors) have done so. Everything is all good there.

😕 The bad news is that it appears that one or more commits were authored or co-authored by someone other than the pull request submitter. We need to confirm that all authors are ok with their commits being contributed to this project. Please have them confirm that here in the pull request.

Note to project maintainer: This is a terminal state, meaning the cla/google commit status will not change from this state. It's up to you to confirm consent of all the commit author(s), set the cla label to yes (if enabled on your project), and then merge this pull request when appropriate.

ℹ️ Googlers: Go here for more info.

[googlebot]

CLAs look good, thanks!

ℹ️ Googlers: Go here for more info.

[mary-poppins]

You can preview 06ba417 at https://pr31120-06ba417.ngbuilds.io/.

[mary-poppins]

You can preview b5dfc9c at https://pr31120-b5dfc9c.ngbuilds.io/.

[mary-poppins]

You can preview 1abe825 at https://pr31120-1abe825.ngbuilds.io/.

[kara]

@brandonroberts is this ready to merge or are you waiting for the other pending reviewers? If you want to override the pending reviews, just add a "merge assistance" label (we've been using "merge" as auto-submit)

[brandonroberts]

@kara its ready to merge

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}