test: cover Solid SSR route error rendering

[Sheraff]

Summary

• add a Solid server-side regression test for a route loader throwing during SSR
• assert the response status becomes 500 and the rendered HTML contains the route error component instead of the route component
• document the current main-branch behavior so future SSR error handling changes are caught

Validation

• pnpm exec vitest --mode server tests/server/errorComponent.test.tsx
• CI=1 NX_DAEMON=false pnpm nx run @tanstack/solid-router:test:eslint --outputStyle=stream --skipRemoteCache
• CI=1 NX_DAEMON=false pnpm nx run @tanstack/solid-router:test:types --outputStyle=stream --skipRemoteCache

Summary by CodeRabbit

• Tests
  • Added test coverage for server-side error handling in route loaders, validating that error components render correctly and appropriate status codes are returned when errors occur during server-side rendering.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 5082fdc1-2543-461c-a1ed-e9185038a29d

📥 Commits

Reviewing files that changed from the base of the PR and between 4ea2a62 and 2776d74.

📒 Files selected for processing (1)

• packages/solid-router/tests/server/errorComponent.test.tsx

---

📝 Walkthrough

Walkthrough

A new server-side test file was added to validate SSR behavior when a route loader throws an error, verifying that the error component renders correctly with a 500 status code and the normal route content is excluded.

Changes

Cohort / File(s)	Summary
Error Component SSR Test packages/solid-router/tests/server/errorComponent.test.tsx	Adds test coverage for server-side error handling in route loaders, verifying errorComponent rendering and correct HTTP status code behavior.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A test hops in to check the way,
When loaders fail along the way,
Error components catch the fall,
Five-hundred status for them all,
SSR safety, tested well! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'test: cover Solid SSR route error rendering' is directly related to the main change, which adds a server-side test file (errorComponent.test.tsx) that validates SSR behavior when a route loader throws an error.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch test/solid-ssr-error-component

---

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 2776d74

Command	Status	Duration	Result
nx run-many --target=build --exclude=examples/*...	✅ Succeeded	2s	View ↗
nx affected --targets=test:eslint,test:unit,tes...	✅ Succeeded	1m 47s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-03-08 07:25:38 UTC

[pkg-pr-new]

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commit: 757a570

[github-actions]

Bundle Size Benchmarks

• Commit: 4ea2a62787d0
• Measured at: 2026-03-08T07:26:30.907Z
• Baseline source: history:4ea2a62787d0
• Dashboard: bundle-size history

Scenario	Current (gzip)	Delta vs baseline	Raw	Brotli	Trend
react-router.minimal	86.84 KiB	0 B (0.00%)	273.33 KiB	75.44 KiB	▁▁▁▁▁██████
react-router.full	89.88 KiB	0 B (0.00%)	283.67 KiB	78.18 KiB	▁▁▁▁▁██████
solid-router.minimal	36.17 KiB	0 B (0.00%)	108.44 KiB	32.49 KiB	▁▁▁▁▁██████
solid-router.full	40.50 KiB	0 B (0.00%)	121.49 KiB	36.40 KiB	▁▁▁▁▁██████
vue-router.minimal	52.03 KiB	0 B (0.00%)	148.42 KiB	46.71 KiB	▁▁▁▁▁██████
vue-router.full	56.85 KiB	0 B (0.00%)	164.01 KiB	51.04 KiB	▁▁▁▁▁██████
react-start.minimal	99.40 KiB	0 B (0.00%)	312.48 KiB	85.98 KiB	▁▁▁▁▁██████
react-start.full	102.78 KiB	0 B (0.00%)	322.29 KiB	88.82 KiB	▁▁▁▁▁██████
solid-start.minimal	48.49 KiB	0 B (0.00%)	146.03 KiB	42.85 KiB	▁▁▁▁▁██████
solid-start.full	53.96 KiB	0 B (0.00%)	161.98 KiB	47.51 KiB	▁▁▁▁▁██████

Trend sparkline is historical gzip bytes ending with this PR measurement; lower is better.

[codspeed-hq]

Merging this PR will not alter performance

✅ 6 untouched benchmarks

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_{Comparing test/solid-ssr-error-component (2776d74) with main (4ea2a62)}