FA-24938 / Filter interfaces / Member archive

Membership wraps scalars without nesting existing lists · case 03

Membership wraps scalars without nesting existing lists is violated by the widget projection.

Member previewVariant 3 · 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: Membership wraps scalars without nesting existing lists.

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": false, "null-equality": false, "scalar-arity": 0, "set-arity": 0, "unary-value": 0}`	`{"editor-visible": true, "empty-set-error": false, "null-equality": false, "scalar-arity": 0, "set-arity": [0], "unary-value": 0}`	Failed

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