Better reactive test cancellation#4158

Merged

thomhurst merged 13 commits intomainfrom

feature/reactive-cancellation

Dec 24, 2025

Commits on Dec 24, 2025

Better reactive test cancellation
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Better reactive test cancellation
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Address PR review feedback for reactive cancellation

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Address additional PR review feedback

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Simplify TimeoutHelper with await await pattern and fix issues

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Optimize TimeoutHelper: eliminate duplicate timer, prevent stack overflow

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Use static lambdas to eliminate closure allocations

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docs: add clarifying comments per PR review

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fix: avoid race condition with very small timeouts

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fix: prevent leaked Task.Delay on .NET 7 and earlier

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fix: increase test timeout to 60s for subprocess overhead

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fix: add forceful cancellation as backup for unreliable graceful signals

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test: mark CanCancelTests as Explicit due to CI signal handling limitations

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