FA-24954 / Filter interfaces / Member archive

Only an empty membership list triggers the empty-set validation · case 04

Only an empty membership list triggers the empty-set validation is violated by the widget projection.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

The stipulated filter editor supports equality, set membership and unary presence operators; switching operator updates operand arity rather than executing a query. This example checks: Only an empty membership list triggers the empty-set validation.

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	`{"editor-visible": true, "empty-set-error": true, "null-equality": false, "scalar-arity": null, "set-arity": [], "unary-value": []}`	`{"editor-visible": true, "empty-set-error": false, "null-equality": false, "scalar-arity": null, "set-arity": [], "unary-value": []}`	Failed

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