test(webxr): component-level retry coverage for CloudXRComponent

[gareth-morgan-nv]

Summary

Stacked on #1125 (gmorgan/OOBTests) - pure component-level/behavioral test coverage for CloudXRComponent's bounded retry feature, split out from #1122 (gmorgan/MockCXR-retry, which now targets main directly and contains only the feature implementation).

• Adds CloudXRComponentTest.tsx's retry scripted steps (unrecoverable give-up, recoverable retry+reconnect+counter-reset, attempt exhaustion, cancellation on session end) and the matching Playwright assertions.
• Deliberately black-box: everything is driven through CloudXRComponent's public props and MockCloudXR.triggerFailure(), with no import of isRecoverable() or any other retry-implementation internals - it tests the observable result (feed in an error of a given code, assert retry or give-up), not the classifier function itself.

This branch is currently expected to fail - the retry feature (CloudXRComponent's reconnect prop and retry logic) lives on #1122, a sibling branch, not an ancestor of this one. npm run typecheck fails here with Property 'reconnect' does not exist on type 'CloudXRComponentProps', exactly as expected. This PR should be rebased onto main (or gmorgan/OOBTests once merged) after #1122 merges, at which point these tests should start passing for real.

Test plan

• Confirmed the expected failure: npm run typecheck fails on the missing reconnect prop, not on anything unrelated

🤖 Generated with Claude Code

Summary by CodeRabbit

• Tests
  • Expanded browser coverage for connection failures, retry limits, retry-counter resets, and cancellation when a WebXR session ends.
  • Added integration coverage for headset registration, initial configuration, stream-status updates, and client metrics.
  • Improved test checks for shutdown outcomes and error reporting.

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📝 Walkthrough

Walkthrough

The changes expand the WebXR mock and Playwright tests to cover reconnect retries, retry exhaustion, and cancellation when a session ends. They also add a Python loopback WebSocket server for integration tests of HeadsetControlChannel. Those tests check registration, initial configuration, stream status, and client metrics through OOBControlHub snapshots. Jest now falls back to the ws implementation when the global WebSocket is unavailable.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Merge Risk: 🟡 Moderate · up to a0bac

The retry-exhaustion test can pass without covering the connected-session behavior it is intended to protect. Establish the initial connection before applying the retry delay.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 44.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 25 functions across 5 files. (1 skipped: …	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 identifies the main change: component-level retry coverage for CloudXRComponent. It is concise and directly related to the pull request objectives.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 44.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 25 functions across 5 files. (1 skipped: 1 unsupported.)

✨ Finishing Touches 💡 1

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[yanziz-nvidia]

reviewed by yanziz-review-bot

Summary
This adds black-box component and Playwright coverage for CloudXR retry behavior. Applied atop current main, the focused ESLint/Prettier checks, component-mock build, and Playwright test pass; the current PR still has the documented rebase requirement because its target branch predates the retry implementation.

Legend: 🚫 BLOCKER = merge-blocking | 💡 SUGGESTION = meaningful improvement | 🧹 NIT = precise small correction

Severity	Finding
🚫 BLOCKER	none
💡 SUGGESTION	tests/mock/CloudXRComponentTest.tsx:362 - alwaysConnectWaitMs is enabled before the initial startAndWaitConnected(0). Because onSessionReady prioritizes this override, the initial connection is delayed 5 seconds while the helper silently times out after 3 seconds, so the first failure is injected while still Connecting. The step therefore does not exercise retry exhaustion beginning with the connected stream described by the test. First require the initial connection to succeed, then enable alwaysConnectWaitMs before triggering the first failure so only retried sessions receive the delay.
🧹 NIT	none

Actionables (copy-paste-ready for implementation agents)

Validate these suggestions in context before applying them. Skip anything already addressed, incorrect, or not worth the churn.

• deps/cloudxr/webxr_client/tests/mock/CloudXRComponentTest.tsx:362 - Await and verify the initial session reaches Connected before assigning alwaysConnectWaitMs = 5000; then trigger the first failure so the override applies only to subsequent retry sessions.

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Actionable comments posted: 1

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Inline comments:
Review comments at
@deps/cloudxr/webxr_client/tests/mock/CloudXRComponentTest.tsx:
- Line 362: In Step 4, require the initial session to connect before enabling
the 5000-ms delay or starting the failure loop. Check the result of
startAndWaitConnected(0); if it fails, log the initial-connection failure and
return so retry logs cannot make the step pass.

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📥 Commits

Reviewing files that changed from the base of the PR and between 18a06de and a0bac90.

📒 Files selected for processing (6)

• deps/cloudxr/webxr_client/helpers/controlChannel.test.ts
• deps/cloudxr/webxr_client/jest.setup.js
• deps/cloudxr/webxr_client/package.json
• deps/cloudxr/webxr_client/tests/mock/CloudXRComponentTest.tsx
• deps/cloudxr/webxr_client/tests/playwright/CloudXRComponentTest.spec.js
• tests/python/core/cloudxr/oob_hub_test_server.py

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