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A blank lower bound is open while zero remains closed · case 02

A blank lower bound is open while zero remains closed is violated by the widget projection.

Member previewVariant 2 · 3 implementations · 10 checks per implementation

Case contract

A numeric range editor preserves open ends, treats zero as a bound, and rejects reversed finite endpoints before applying. This example checks: A blank lower bound is open while zero remains closed.

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	`{"empty-constraint": false, "endpoint-order": true, "lower-handle": -5, "lower-open": 0, "upper-handle": 0, "upper-open": 0}`	`{"empty-constraint": false, "endpoint-order": true, "lower-handle": -5, "lower-open": null, "upper-handle": 0, "upper-open": 0}`	Failed

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