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iOS tests: prevent rotating wall-clock wait victims (#8143) - #10721
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📝 WalkthroughWalkthroughThe test suite adds shared wall-clock wait and polling infrastructure. Long waits use a process-wide serialization gate. ChangesWall-clock wait stabilization
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: 🟡 Moderate · up to Waits intended to remain under three seconds are currently treated as suite-scale waits, which can delay them and turn intentional recovery-timeout checks into false positives. Merge should wait until the threshold and related assertions are corrected. Suggested reviewers: Sequence Diagram(s)sequenceDiagram
participant Test
participant LivenessHostRouter
participant MobileShellWallClockWaitGate
participant WaiterStorage
Test->>LivenessHostRouter: waitForCount
LivenessHostRouter->>MobileShellWallClockWaitGate: serialize long wait
LivenessHostRouter->>WaiterStorage: register count waiter
WaiterStorage-->>LivenessHostRouter: count threshold reached
LivenessHostRouter-->>Test: return wait result
MobileShellWallClockWaitGate-->>Test: release serialized wait
🚥 Pre-merge checks | ✅ 24 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (24 passed)
Full details: Linked Issues checkExplanation The changes address issue Full details: Cmux Swift Actor IsolationExplanation PASS: The pull request changes only Swift files under Full details: Cmux Swift Blocking RuntimeExplanation PASS. The PR diff changes only Full details: Cmux Browser Automation Off-MainExplanation PASS: The PR changes only CmuxMobileShell test wait helpers and the Full details: Cmux Expensive Synchronous LoadExplanation PASS: The pull request changes only Full details: Cmux Cache Substitution CorrectnessExplanation PASS: The pull request diff changes only files under Full details: Cmux No Hacky SleepsExplanation PASS — The diff changes only Swift files under Full details: Cmux Algorithmic ComplexityExplanation PASS: The PR diff changes only Full details: Cmux Swift ConcurrencyExplanation PASS — The PR changes only CmuxMobileShell test support and tests. The new wait code uses actors, async/await, structured task groups, cancellation handlers, and continuations. The diff adds no DispatchQueue/DispatchGroup, Combine, or completion-handler APIs. The new test Tasks are stored in local handles and awaited. The cancellation-handler Task is test-only synchronization and is tied to waiter cancellation; the other matching Task uses were pre-existing or moved code. No stated legacy concurrency pattern is introduced or materially expanded. Full details: Cmux Swift `@Concurrent`Explanation PASS: The PR introduces no Full details: Cmux Swift Package BoundariesExplanation PASS: The complete diff against Full details: Cmux Swiftpm LockfilesExplanation The pull request changes only Swift test-support and test files. They do not modify a cmux-owned Full details: Cmux Swift LoggingExplanation PASS: The diff changes only files under Full details: Cmux User-Facing Error PrivacyExplanation PASS: The pull request changes only files under Full details: Cmux Full InternationalizationExplanation PASS — the PR changes only Full details: Cmux Swiftui State LayoutExplanation PASS: The pull request does not change SwiftUI code. The diff from base 835d046 to HEAD changes only CmuxMobileShell test files, adding actor-based wall-clock polling/count helpers and a serialized test suite, plus removing and relocating test support. The changed files import Foundation, Testing, or test modules, and contain no SwiftUI import, View boundary, ObservableObject/@published state, GeometryReader, lazy/list row subtree, or render-time state mutation. The SwiftUI state/layout check is therefore inapplicable. Full details: Cmux Architecture RethinkExplanation PASS. The diff changes only Full details: Cmux Swift Auxiliary Window Close ShortcutsExplanation PASS: The PR changes only Full details: Cmux Source ArtifactsExplanation All seven changed paths are hand-written Swift test sources under Full details: Cmux No Test Or Debug Seam In Production SourceExplanation PASS: The pull request diff contains seven Swift files, all under Full details: Cmux No Ambient Global StateExplanation PASS: The pull request changes only files under ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Greptile SummaryThis PR stabilizes CmuxMobileShell tests by serializing suite-scale wall-clock waits while preserving short assertion windows.
Confidence Score: 5/5The PR appears safe to merge because the previously reported short-wait deadline issue is fixed and no blocking failure remains. No blocking failure remains. Important Files Changed
Reviews (4): Last reviewed commit: "test(ios): cover short recovery polls" | Re-trigger Greptile |
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Addressed the review edge case in |
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The wait support was split into dedicated files in |
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Actionable comments posted: 1
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Inline comments:
In
`@Packages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/MobileShellWallClockWaitGate.swift`:
- Around line 56-72: Update suiteScaleThresholdNanoseconds and the related
wait-gating assertions so explicit waits under three seconds bypass
serialization: use a three-second threshold, with 100 poll attempts bypassing
the gate and 300 attempts triggering serialization. Preserve the existing
timeout expansion and polling behavior for waits at or above the threshold.
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📒 Files selected for processing (7)
Packages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/IrohConnectionRecoveryOwnerTests.swiftPackages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/IrohReconnectRouteSelectionTests.swiftPackages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/LivenessHostRouter+WallClockWaits.swiftPackages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/MobileShellPolling.swiftPackages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/MobileShellRenderGridLivenessTestSupport.swiftPackages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/MobileShellWallClockWaitGate.swiftPackages/iOS/CmuxMobileShell/Tests/CmuxMobileShellTests/ReconnectRouteSelectionTests.swift
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teamleaderleo
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S2: major
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Still live. The branch includes the requested three-second wait threshold; leaving open while the main-merge conflict is resolved. |
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Summary
Fixes #8143 by making the shared CmuxMobileShell test wait helpers resilient to whole-suite MainActor scheduling:
pollUntil/waitForCountwall-clock wait sections through a FIFO actor gate; unrelated tests remain parallelReconnectRouteSelectionTests, the recovery/replay suite implicated by the rotating victimsVerification
swiftc -parsepassed for all changed Swift filesCMUXMobileCoreand package-conventions jobs fail on the current baseline; the same workflow has failed onmain. The affected package step was skipped.Never merge without a successful focused
swift test --package-path Packages/iOS/CmuxMobileShellon the approved builder.Need help on this PR? Tag
@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Stabilizes iOS tests by serializing only wall‑clock waits and giving long waits suite‑scale headroom to avoid MainActor contention. Short waits keep their deadlines, and unrelated tests stay parallel.
Migration
Written for commit 373395a. Summary will update on new commits.
Summary by CodeRabbit