FA-25822 / Filter interfaces / Member archive

The drop position determines the new group operand order · case 02

The drop position determines the new group operand order is violated by the widget projection.

Member previewVariant 2 · 3 implementations · 10 checks per implementation

Case contract

A filter-builder drag moves a criterion between explicit group identities, rejects descendant cycles, and retains operator grouping when flattening is unsafe. This example checks: The drop position determines the new group operand order.

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	`{"cycle-block": true, "destination-duplicate": false, "destination-insert": ["x", "y", "a"], "flatten-safe": false, "source-membership": true, "source-removal": ["b"]}`	`{"cycle-block": true, "destination-duplicate": false, "destination-insert": ["a", "x", "y"], "flatten-safe": false, "source-membership": true, "source-removal": ["b"]}`	Failed

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