test: fix vue viewTransition e2e flakiness

[Sheraff]

Summary by CodeRabbit

• Tests
  • Improved reliability of end-to-end view transition tests by switching to polling-based assertions; reduces flakiness and better captures asynchronous UI behavior during transitions.

[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: f6ea0798-8b13-4d51-a3dc-a2cf6ed0ff22

📥 Commits

Reviewing files that changed from the base of the PR and between 117c1e5 and 19c6608.

📒 Files selected for processing (1)

• e2e/vue-router/view-transitions/tests/view-transitions.spec.ts

🚧 Files skipped from review as they are similar to previous changes (1)

• e2e/vue-router/view-transitions/tests/view-transitions.spec.ts

---

📝 Walkthrough

Walkthrough

A test in the view-transitions spec was changed to use polling-based assertion (expect.poll) that waits for window.__viewTransitionCalls to become non-empty instead of performing an immediate synchronous check.

Changes

Cohort / File(s)	Summary
Test Assertion Enhancement e2e/vue-router/view-transitions/tests/view-transitions.spec.ts	Replaced synchronous checks of __viewTransitionCalls with expect.poll to wait until the array is populated, making the test tolerant of asynchronous timing.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 I waited patiently, paw on the clock,

Polling the garden, tick by tick-tock,
The array filled slowly, a hop then a cheer,
View transitions appeared — now the path is clear! ✨

🚥 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: fix vue viewTransition e2e flakiness' clearly and specifically describes the main change: fixing flaky e2e tests for Vue view transitions by replacing immediate assertions with polling-based assertions.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ 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-vue-transition-fix-flakiness

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit 19c6608

Command	Status	Duration	Result
nx affected --targets=test:eslint,test:unit,tes...	✅ Succeeded	1m 27s	View ↗
nx run-many --target=build --exclude=examples/*...	✅ Succeeded	4s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-03-05 23:03:49 UTC

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commit: 78bf061

[github-actions]

Bundle Size Benchmarks

• Commit: 64dee75088e3
• Measured at: 2026-03-05T23:04:28.182Z
• Baseline source: history:64dee75088e3
• 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

✅ 5 untouched benchmarks

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_{Comparing test-vue-transition-fix-flakiness (117c1e5) with main (64dee75)}