FA-26147 / Filter interfaces / Member archive

A group cannot normalize when any child lacks a supported complement · case 02

A group cannot normalize when any child lacks a supported complement is violated by the widget projection.

Member previewVariant 2 · 3 implementations · 10 checks per implementation

Case contract

Negating a filter group preserves its explicit wrapper; converting a negated group to normal form flips conjunction and complements every supported child operator atomically. This example checks: A group cannot normalize when any child lacks a supported complement.

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	`{"complement-all": [], "negated-caption": "x", "normal-form-mode": "and", "normalizable": false, "retain-wrapper": false, "wrapper-toggle": true}`	`{"complement-all": [], "negated-caption": "x", "normal-form-mode": "and", "normalizable": true, "retain-wrapper": false, "wrapper-toggle": true}`	Failed

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