FA-25317 / Filter interfaces / Member archive

Zero bounds display numerically instead of as an open-bound placeholder · case 02

Zero bounds display numerically instead of as an open-bound placeholder is violated by the widget projection.

Member previewVariant 2 · 3 implementations · 10 checks per implementation

Case contract

The filter stores canonical integer base units while the editor shows exact scaled integers; a unit switch changes presentation without changing the committed quantity. This example checks: Zero bounds display numerically instead of as an open-bound placeholder.

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	`{"display-bound": 0, "fraction-indicator": false, "open-placeholder": "any", "parse-bound": null, "step-storage": 2, "switch-preserve": 0}`	`{"display-bound": 0, "fraction-indicator": false, "open-placeholder": "0", "parse-bound": null, "step-storage": 2, "switch-preserve": 0}`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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