FA-26133 / Filter interfaces / Member archive

Group negation toggles rather than only setting or clearing · case 03

Group negation toggles rather than only setting or clearing is violated by the widget projection.

Member previewVariant 3 · 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: Group negation toggles rather than only setting or clearing.

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": ["ne"], "negated-caption": "NOT (a AND b)", "normal-form-mode": "or", "normalizable": true, "retain-wrapper": false, "wrapper-toggle": true}`	`{"complement-all": ["ne"], "negated-caption": "NOT (a AND b)", "normal-form-mode": "or", "normalizable": true, "retain-wrapper": false, "wrapper-toggle": false}`	Failed

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