FA-25073 / Filter interfaces / Member archive

Explicit empty text is serialized while an absent filter is omitted · case 03

Explicit empty text is serialized while an absent filter is omitted is violated by the widget projection.

Member previewVariant 3 · 3 implementations · 10 checks per implementation

Case contract

A filter widget owns query keys with the exact f. prefix; it must preserve route parameters and distinguish repeated values from comma-containing literals. This example checks: Explicit empty text is serialized while an absent filter is omitted.

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-scalar": [["tag", "x"]], "literal-comma": [], "multi-serialize": [], "owned-prefix": ["f.color"], "preserve-route": ["ref.x", "foo", "q"], "scope-key": "left.tag"}`	`{"empty-scalar": [], "literal-comma": [], "multi-serialize": [], "owned-prefix": ["f.color"], "preserve-route": ["ref.x", "foo", "q"], "scope-key": "left.tag"}`	Failed

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