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Case-insensitive text filters use casefold while sensitive filters preserve case · case 04

Case-insensitive text filters use casefold while sensitive filters preserve case is violated by the widget projection.

Member previewVariant 4 · 3 implementations · 10 checks per implementation

Case contract

Text filters distinguish exact, prefix and contains modes; literal punctuation remains literal, and trimming and case policy are explicit editor options. This example checks: Case-insensitive text filters use casefold while sensitive filters preserve case.

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	`{"case-policy": " ab ", "case-serialization": {"case_sensitive": true}, "empty-permitted": true, "literal-preview": " Ab ", "mode-caption": "is exactly", "trim-policy": "Ab"}`	`{"case-policy": " Ab ", "case-serialization": {"case_sensitive": true}, "empty-permitted": true, "literal-preview": " Ab ", "mode-caption": "is exactly", "trim-policy": "Ab"}`	Failed

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