FA-38557 / Tree accessibility / Member archive

Persisted hierarchical expansion restoration: Restoration omits a branch ancestor chain · case 02

Restoration omits a branch ancestor chain produces the wrong hierarchical widget state in a regression fixture.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Only present branch IDs may be restored. Ancestors of restored open branches are opened unless explicitly blocked. Selection and focus restore independently: selection keeps present enabled rows; hidden focus falls back to nearest visible ancestor. The persisted root instance must match.

Why this case matters

Offline executable model of a hierarchical accessibility interaction; inputs are bounded and valid as stipulated. No browser, assistive technology, or normative ARIA conformance is claimed.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
deep saved	`[["a", "b"], ["leaf"], ["r", "other"], "r"]`	`[["a", "b", "r"], ["leaf"], ["r", "a", "b", "leaf", "other"], "leaf"]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

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

Member access is invitation-based. Sign in with your invited account to inspect the sources.