FA-8420 / Assistive announcements / Member archive

Live-region announcement scheduling: Busy live regions announce incomplete updates · case 05

Busy live regions announce incomplete updates.

Member previewVariant 5 · 3 implementations · 12 checks per implementation

Case contract

Suppress identical and off updates; busy queues preserve order; assertive updates supersede pending work; atomic reads full content and incremental mode reads appended content.

Why this case matters

A deterministic model of live-region announcement scheduling; this isolates one interface invariant without requiring a browser.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
busy	`[["first"], "new"]`	`[["first", "new"], "old"]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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