FA-8685 / Overlay interactions / Member archive
Overlay dismissal stack: Dismissal policy is taken from an underlying overlay · case 05
Dismissal policy is taken from an underlying overlay.
Case contract
Only the topmost overlay handles Escape/outside policy; inside descendants are exempt; explicit unmount removes only its identity.
Why this case matters
A deterministic model of overlay dismissal stack; this isolates one interface invariant without requiring a browser.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| topmost | [{"escape": false, "id": "a", "inside": ["a"], "outside": false}, {"escape": true, "id": "z", "inside": ["z"], "outside": true}] | [{"escape": false, "id": "a", "inside": ["a"], "outside": false}] | Failed |
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