Removed rewire from frontend unit tests

[9larsons]

Why

rewire is a CommonJS-only test tool — it can't operate on ES modules — and is one of the test-side blockers for an eventual ghost/core ESM migration. This is the first slice of removing it from the unit suite.

What

De-rewires 4 frontend unit tests, replacing rewire's __get__/__set__ with idiomatic alternatives:

• sinon.stub on the shared required object where the dependency is already an object — image-dimensions stubs imageSizeCache.getCachedImageSizeFromUrl directly. No production change.
• a small _private export seam where the dependency is a module-local object or a bare-function require — templates exposes its existing _private; canonical-url and rss/cache expose a _private holder for getUrl / generateFeed.

No vi.mock / vi.spyOn: the unit suite uses neither, because it runs with isolate: false where vi.mock leaks across files.

Notes

• No test behaviour changes — all assertions preserved.
• rewire stays in devDependencies for now; other unit + legacy files still use it and are de-rewired in later slices.

Testing

• The 4 files pass under Vitest.
• The full test/unit/frontend/ lane (139 files / 1880 tests) passes, confirming the stub-on-shared-singleton seams don't leak across files.

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 25fa604c-0d18-4ca3-8e74-fde13891cc6d

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch esm-prep/derewire-frontend-tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[nx-cloud]

🤖 Nx Cloud AI Fix

Ensure the fix-ci command is configured to always run in your CI pipeline to get automatic fixes in future runs. For more information, please see https://nx.dev/ci/features/self-healing-ci

---

View your CI Pipeline Execution ↗ for commit dae05f7

Command	Status	Duration	Result
nx run ghost:test:ci:integration:no-coverage	✅ Succeeded	1m 49s	View ↗
nx run ghost:test:ci:integration	✅ Succeeded	1m 9s	View ↗
nx run ghost:test:ci:e2e:no-coverage	✅ Succeeded	3m 54s	View ↗
nx run ghost:test:ci:e2e	✅ Succeeded	3m 51s	View ↗
nx run ghost:test:ci:legacy	✅ Succeeded	2m 18s	View ↗
nx build @tryghost/announcement-bar	✅ Succeeded	<1s	View ↗
nx build @tryghost/portal	✅ Succeeded	<1s	View ↗
nx build @tryghost/signup-form	✅ Succeeded	<1s	View ↗
Additional runs (10)	✅ Succeeded	...	View ↗

💡 Verify your cache is correct by running tasks in a sandbox. Read docs ↗

---

☁️ Nx Cloud last updated this comment at 2026-06-16 17:11:38 UTC