fix: bound e2e process and server cleanup

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Summary

• bound E2E child shutdown after the success marker so SIGINT cannot leave a test waiting indefinitely
• force-kill a stubborn child after a short grace period
• handle children that exit before an exit listener is attached
• await local HTTP server shutdown and close remaining connections during test teardown
• add a regression test for a child that ignores SIGINT

Closes #323

Summary by CodeRabbit

• Tests
  • Improved end-to-end test cleanup to shut down servers and child processes more reliably.
  • Added safeguards to prevent duplicate cleanup actions and ensure timed-out processes are terminated.
  • Added coverage for processes that ignore graceful shutdown requests, helping keep test runs from hanging.

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📝 Walkthrough

Walkthrough

The E2E test helpers now provide bounded server and child-process cleanup. Process runners prevent duplicate completion handling. Test teardown hooks use the server cleanup helper, and coverage verifies forced termination of SIGINT-resistant children.

Changes

E2E cleanup

Layer / File(s)	Summary
Bounded process and server cleanup tests/e2e/suggest-smoke.test.mjs	Adds closeServer, wait, and stopChild. onceExit now handles children that exited before listener registration.
Child-process lifecycle integration tests/e2e/suggest-smoke.test.mjs	runSuggestUntil and runNodeProcess use bounded cleanup and settled-state guards. A test covers a child that ignores SIGINT.
Test teardown adoption tests/e2e/suggest-smoke.test.mjs	E2E teardown hooks replace direct server.close() calls with closeServer.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: mikemikimike

Merge Risk: 🟡 Moderate · up to 2ff35

A child-process error during timeout cleanup can make E2E runs fail unpredictably. Handle the cleanup rejection before merging.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: bounded cleanup for E2E processes and servers.
Linked Issues check	✅ Passed	Issue #323 requires npm test to terminate after the E2E suite completes. The PR bounds child cleanup with stopChild: it sends SIGINT, waits for a grace period, and sends SIGKILL when required.…
Out of Scope Changes check	✅ Passed	The changes stay within issue #323. They modify E2E process and HTTP server cleanup helpers, update related teardown hooks, and add a regression test for forced child cleanup. No unrelated product beh…

✨ Finishing Touches 💡 1

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
In `@tests/e2e/suggest-smoke.test.mjs`:
- Around line 121-123: Update both timeout handlers using stopChild to handle
cleanup promise rejection: replace the discarded finally flow with success and
rejection handling so the timeout error is emitted only when cleanup succeeds,
while cleanup failures are passed to the enclosing reject callback. Preserve the
existing timeout messages for the text-wait and labeled-run paths.

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ℹ️ Review info

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Configuration used: Organization UI

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📥 Commits

Reviewing files that changed from the base of the PR and between 2a44b90 and 2ff357a.

📒 Files selected for processing (1)

• tests/e2e/suggest-smoke.test.mjs

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📜 Review details

⏰ Context from checks skipped due to timeout. (2)

• GitHub Check: cubic · AI code reviewer
• GitHub Check: Test (windows-latest)

[cubic-dev-ai]

All reported issues were addressed across 1 file

<sub>Shadow auto-approve: would not auto-approve because issues were found.

Re-trigger cubic</sub>

[cubic-dev-ai]

0 issues found across 1 file (changes from recent commits).

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

<sub>Shadow auto-approve: would auto-approve. Improves E2E test teardown by awaiting server shutdown and gracefully stopping child processes with SIGINT then force-killing after a grace period, with a regression test for SIGINT-ignoring children.

Re-trigger cubic</sub>

[cubic-dev-ai]

All reported issues were addressed across 1 file (changes from recent commits).

<sub>Shadow auto-approve: would not auto-approve because issues were found.
Tip: Review your code locally with the cubic CLI to iterate faster.

Re-trigger cubic</sub>

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[cubic-dev-ai]

0 issues found across 1 file (changes from recent commits).

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

<sub>Shadow auto-approve: would require human review. PR hardens E2E teardown to stop child processes with SIGTERM and the server. But it should also wait for handle_evidence to handle this fine. However, the separate src/store.tsx changes in this holds for the second lock release data error, which is not yet completed and is not shown.

Re-trigger cubic</sub>