FA-25893 / Filter interfaces / Member archive

Missing lower option identities do not silently become the first option · case 03

Missing lower option identities do not silently become the first option is violated by the widget projection.

Member previewVariant 3 · 3 implementations · 10 checks per implementation

Case contract

A discrete range selector uses ordered option indices, preserves endpoint option identities across rerender, and renders unavailable selected options as unresolved. This example checks: Missing lower option identities do not silently become the first option.

Why this case matters

Filter-widget state and serialization must preserve user constraints while the view changes.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
contract fixture 0	`{"endpoint-payload": ["medium", "a"], "full-domain": false, "lower-index": 0, "range-order": false, "unresolved-endpoints": ["a"], "upper-index": null}`	`{"endpoint-payload": ["medium", "a"], "full-domain": false, "lower-index": 1, "range-order": false, "unresolved-endpoints": ["a"], "upper-index": null}`	Failed

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