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Reversed draft ranges show an error while equal endpoints remain valid · case 04

Reversed draft ranges show an error while equal endpoints remain valid is violated by the widget projection.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

Editing one numeric endpoint clamps only when the range lock is enabled; linked-width edits translate the opposite endpoint, and unbounded sides remain unbounded. This example checks: Reversed draft ranges show an error while equal endpoints remain valid.

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	`{"link-enabled": true, "linked-lower": -1, "linked-upper": -1, "lower-clamp": -1, "reversal-warning": true, "upper-clamp": 5}`	`{"link-enabled": true, "linked-lower": -1, "linked-upper": -1, "lower-clamp": -1, "reversal-warning": false, "upper-clamp": 5}`	Failed

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