FA-25147 / Filter interfaces / Member archive

Only excluded facets enter the negative operand channel · case 02

Only excluded facets enter the negative operand channel is violated by the widget projection.

Member previewVariant 2 · 3 implementations · 10 checks per implementation

Case contract

A facet has neutral/include/exclude states. The UI cycles neutral to include to exclude to neutral, exposes polarity, and serializes inclusion and exclusion separately. This example checks: Only excluded facets enter the negative operand channel.

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": "exclude", "exclusion-badge": "check", "negation-help": "Exclude blue", "negative-operand": "blue", "positive-operand": "blue", "reverse-cycle": "neutral"}`	`{"cycle": "exclude", "exclusion-badge": "check", "negation-help": "Exclude blue", "negative-operand": null, "positive-operand": "blue", "reverse-cycle": "neutral"}`	Failed

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