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FA-25461 / Filter interfaces / Open access

Explicit empty equality is valid while empty broad-match operands are not · case 01

Explicit empty equality is valid while empty broad-match operands are not is violated by the widget projection.

Verified by executionVariant 1 · 10 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The empty-permitted decision uses `bool(d['text'])` instead of the stipulated text-match-editor projection.

THE FAILURE

The empty-permitted decision uses `bool(d['text'])` instead of the stipulated text-match-editor projection.

Unsuccessful approach: The attempted correction `True` still violates the explicit contract fixtures.

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: Explicit empty equality is valid while empty broad-match operands are not.

Why this case matters

Filter-widget state and serialization must preserve user constraints while the view changes.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    return {'literal-preview':(d['text']), 'trim-policy':(d['text'].strip() if d['trim'] else d['text']), 'case-policy':(d['text'].casefold() if d['fold'] else d['text']), 'mode-caption':({'eq':'is exactly','prefix':'starts with','contains':'contains'}[d['mode']]), 'empty-permitted':(bool(d['text'])), 'case-serialization':({'case_sensitive':not d['fold']})}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'text': '', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': '', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'contains', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'starts with', 'empty-permitted': False, 'case-serialization': {'case_sensitive': True}}), ({'text': ' Ab ', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': ' Ab ', 'trim-policy': ' Ab ', 'case-policy': ' Ab ', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': ' Ab ', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': ' Ab ', 'trim-policy': ' Ab ', 'case-policy': ' ab ', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': ' Ab ', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': ' Ab ', 'trim-policy': 'Ab', 'case-policy': ' ab ', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': True, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': False, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': True, 'fold': False, 'mode': 'eq'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}})], 2: [({'text': '', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'starts with', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': ' Ab ', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': ' Ab ', 'trim-policy': ' Ab ', 'case-policy': ' Ab ', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': ' Ab ', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': ' Ab ', 'trim-policy': 'Ab', 'case-policy': ' Ab ', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a*b', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a*b', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': True, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'Straße', 'trim': False, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}})], 3: [({'text': '', 'trim': True, 'fold': False, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': '', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'contains', 'empty-permitted': False, 'case-serialization': {'case_sensitive': True}}), ({'text': ' Ab ', 'trim': True, 'fold': True, 'mode': 'eq'}, {'literal-preview': ' Ab ', 'trim-policy': 'Ab', 'case-policy': ' ab ', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a*b', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'Straße', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'strasse', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'Straße', 'trim': True, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}})], 4: [({'text': '', 'trim': True, 'fold': True, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'starts with', 'empty-permitted': False, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a*b', 'trim': False, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': True, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'Straße', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'Straße', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'strasse', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'Straße', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'strasse', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}})], 5: [({'text': '', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': '', 'trim': True, 'fold': True, 'mode': 'contains'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'contains', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': True, 'fold': True, 'mode': 'contains'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': False, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': True, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'Straße', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'Straße', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': '', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'contains', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'starts with', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': ' Ab ', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': ' Ab ', 'trim-policy': ' Ab ', 'case-policy': ' ab ', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}})]}
for index, (data, expected) in enumerate(fixtures[N]):
    check("contract fixture " + str(index), solve(data), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
contract fixture 0{'case-policy': '', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': False, 'literal-preview': '', 'mode-caption': 'is exactly', 'trim-policy': ''}{'case-policy': '', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': '', 'mode-caption': 'is exactly', 'trim-policy': ''}Failed
contract fixture 1{'case-policy': '', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': False, 'literal-preview': '', 'mode-caption': 'contains', 'trim-policy': ''}{'case-policy': '', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': False, 'literal-preview': '', 'mode-caption': 'contains', 'trim-policy': ''}Passed
contract fixture 2{'case-policy': '', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': False, 'literal-preview': '', 'mode-caption': 'starts with', 'trim-policy': ''}{'case-policy': '', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': False, 'literal-preview': '', 'mode-caption': 'starts with', 'trim-policy': ''}Passed
contract fixture 3{'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 '}Passed
contract fixture 4{'case-policy': ' ab ', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': ' Ab ', 'mode-caption': 'contains', 'trim-policy': ' Ab '}{'case-policy': ' ab ', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': ' Ab ', 'mode-caption': 'contains', 'trim-policy': ' Ab '}Passed
contract fixture 5{'case-policy': ' ab ', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': ' Ab ', 'mode-caption': 'starts with', 'trim-policy': 'Ab'}{'case-policy': ' ab ', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': ' Ab ', 'mode-caption': 'starts with', 'trim-policy': 'Ab'}Passed
contract fixture 6{'case-policy': 'a*b', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': 'a*b', 'mode-caption': 'is exactly', 'trim-policy': 'a*b'}{'case-policy': 'a*b', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': 'a*b', 'mode-caption': 'is exactly', 'trim-policy': 'a*b'}Passed
contract fixture 7{'case-policy': 'a*b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a*b', 'mode-caption': 'contains', 'trim-policy': 'a*b'}{'case-policy': 'a*b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a*b', 'mode-caption': 'contains', 'trim-policy': 'a*b'}Passed
contract fixture 8{'case-policy': 'a%b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a%b', 'mode-caption': 'starts with', 'trim-policy': 'a%b'}{'case-policy': 'a%b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a%b', 'mode-caption': 'starts with', 'trim-policy': 'a%b'}Passed
contract fixture 9{'case-policy': 'a%b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a%b', 'mode-caption': 'is exactly', 'trim-policy': 'a%b'}{'case-policy': 'a%b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a%b', 'mode-caption': 'is exactly', 'trim-policy': 'a%b'}Passed

SHA-256 / 2250f2a4f7da10b9e029b3ed2ea9c9f777280bbbc662bcc71d20be0a43198b54

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    return {'literal-preview':(d['text']), 'trim-policy':(d['text'].strip() if d['trim'] else d['text']), 'case-policy':(d['text'].casefold() if d['fold'] else d['text']), 'mode-caption':({'eq':'is exactly','prefix':'starts with','contains':'contains'}[d['mode']]), 'empty-permitted':(True), 'case-serialization':({'case_sensitive':not d['fold']})}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = {1: [({'text': '', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': '', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'contains', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'starts with', 'empty-permitted': False, 'case-serialization': {'case_sensitive': True}}), ({'text': ' Ab ', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': ' Ab ', 'trim-policy': ' Ab ', 'case-policy': ' Ab ', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': ' Ab ', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': ' Ab ', 'trim-policy': ' Ab ', 'case-policy': ' ab ', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': ' Ab ', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': ' Ab ', 'trim-policy': 'Ab', 'case-policy': ' ab ', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': True, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': False, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': True, 'fold': False, 'mode': 'eq'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}})], 2: [({'text': '', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'starts with', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': ' Ab ', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': ' Ab ', 'trim-policy': ' Ab ', 'case-policy': ' Ab ', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': ' Ab ', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': ' Ab ', 'trim-policy': 'Ab', 'case-policy': ' Ab ', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a*b', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a*b', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': True, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'Straße', 'trim': False, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}})], 3: [({'text': '', 'trim': True, 'fold': False, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': '', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'contains', 'empty-permitted': False, 'case-serialization': {'case_sensitive': True}}), ({'text': ' Ab ', 'trim': True, 'fold': True, 'mode': 'eq'}, {'literal-preview': ' Ab ', 'trim-policy': 'Ab', 'case-policy': ' ab ', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a*b', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'Straße', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'strasse', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'Straße', 'trim': True, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}})], 4: [({'text': '', 'trim': True, 'fold': True, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'starts with', 'empty-permitted': False, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a*b', 'trim': False, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': True, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'a%b', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'Straße', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'Straße', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'strasse', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'Straße', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'strasse', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}})], 5: [({'text': '', 'trim': False, 'fold': False, 'mode': 'eq'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': '', 'trim': True, 'fold': True, 'mode': 'contains'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'contains', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a*b', 'trim': True, 'fold': True, 'mode': 'contains'}, {'literal-preview': 'a*b', 'trim-policy': 'a*b', 'case-policy': 'a*b', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': False, 'fold': True, 'mode': 'prefix'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'a%b', 'trim': True, 'fold': True, 'mode': 'eq'}, {'literal-preview': 'a%b', 'trim-policy': 'a%b', 'case-policy': 'a%b', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}}), ({'text': 'Straße', 'trim': False, 'fold': False, 'mode': 'contains'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'contains', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': 'Straße', 'trim': True, 'fold': False, 'mode': 'prefix'}, {'literal-preview': 'Straße', 'trim-policy': 'Straße', 'case-policy': 'Straße', 'mode-caption': 'starts with', 'empty-permitted': True, 'case-serialization': {'case_sensitive': True}}), ({'text': '', 'trim': False, 'fold': True, 'mode': 'contains'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'contains', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': '', 'trim': True, 'fold': True, 'mode': 'prefix'}, {'literal-preview': '', 'trim-policy': '', 'case-policy': '', 'mode-caption': 'starts with', 'empty-permitted': False, 'case-serialization': {'case_sensitive': False}}), ({'text': ' Ab ', 'trim': False, 'fold': True, 'mode': 'eq'}, {'literal-preview': ' Ab ', 'trim-policy': ' Ab ', 'case-policy': ' ab ', 'mode-caption': 'is exactly', 'empty-permitted': True, 'case-serialization': {'case_sensitive': False}})]}
for index, (data, expected) in enumerate(fixtures[N]):
    check("contract fixture " + str(index), solve(data), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
contract fixture 0{'case-policy': '', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': '', 'mode-caption': 'is exactly', 'trim-policy': ''}{'case-policy': '', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': '', 'mode-caption': 'is exactly', 'trim-policy': ''}Passed
contract fixture 1{'case-policy': '', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': '', 'mode-caption': 'contains', 'trim-policy': ''}{'case-policy': '', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': False, 'literal-preview': '', 'mode-caption': 'contains', 'trim-policy': ''}Failed
contract fixture 2{'case-policy': '', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': '', 'mode-caption': 'starts with', 'trim-policy': ''}{'case-policy': '', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': False, 'literal-preview': '', 'mode-caption': 'starts with', 'trim-policy': ''}Failed
contract fixture 3{'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 '}Passed
contract fixture 4{'case-policy': ' ab ', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': ' Ab ', 'mode-caption': 'contains', 'trim-policy': ' Ab '}{'case-policy': ' ab ', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': ' Ab ', 'mode-caption': 'contains', 'trim-policy': ' Ab '}Passed
contract fixture 5{'case-policy': ' ab ', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': ' Ab ', 'mode-caption': 'starts with', 'trim-policy': 'Ab'}{'case-policy': ' ab ', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': ' Ab ', 'mode-caption': 'starts with', 'trim-policy': 'Ab'}Passed
contract fixture 6{'case-policy': 'a*b', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': 'a*b', 'mode-caption': 'is exactly', 'trim-policy': 'a*b'}{'case-policy': 'a*b', 'case-serialization': {'case_sensitive': False}, 'empty-permitted': True, 'literal-preview': 'a*b', 'mode-caption': 'is exactly', 'trim-policy': 'a*b'}Passed
contract fixture 7{'case-policy': 'a*b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a*b', 'mode-caption': 'contains', 'trim-policy': 'a*b'}{'case-policy': 'a*b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a*b', 'mode-caption': 'contains', 'trim-policy': 'a*b'}Passed
contract fixture 8{'case-policy': 'a%b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a%b', 'mode-caption': 'starts with', 'trim-policy': 'a%b'}{'case-policy': 'a%b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a%b', 'mode-caption': 'starts with', 'trim-policy': 'a%b'}Passed
contract fixture 9{'case-policy': 'a%b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a%b', 'mode-caption': 'is exactly', 'trim-policy': 'a%b'}{'case-policy': 'a%b', 'case-serialization': {'case_sensitive': True}, 'empty-permitted': True, 'literal-preview': 'a%b', 'mode-caption': 'is exactly', 'trim-policy': 'a%b'}Passed

SHA-256 / 826c379ff783ecfbfc4536970dea66c8172650a4469b81901a8a4f0af5018347

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 10 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

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Verification & scope

Deterministic bounded UI-state model only; no browser, query engine, network, or production-standard conformance is claimed. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:41:06.942586+00:00.

Case digest / 5cc113990e7f3904a16d4fbaf79bd5a593837900d787a58e0f54fcaddc5aaed8