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FA-39666 / Tree accessibility / Open access

Hierarchical sibling sort and stable identity: Sort replacement closure duplicates descendants or deletes unrelated roots · case 01

Sort replacement closure duplicates descendants or deletes unrelated roots produces the wrong hierarchical widget state in a regression fixture.

Verified by executionVariant 1 · 6 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The sibling-sort contract is violated at `{x for block in blocks.values() for x in block}` by replacing it with `set(roots)`.

VERIFIED REPAIR

Restore `{x for block in blocks.values() for x in block}` at this fault site while retaining the other tree state decisions.

Unsuccessful approach: The partial repair `set(d['order'])` still violates a boundary or preservation case.

Case contract

Only direct children of the target parent are sorted by casefolded display label, with original order retained on ties; each child subtree moves as one block. Missing labels sort last in ascending order; descending reverses the complete comparison order. Focus, selection and expansion remain ID-based; sibling positions are recomputed from sorted roots.

Why this case matters

Offline executable model of a hierarchical accessibility interaction; inputs are bounded and valid as stipulated. No browser, assistive technology, or normative ARIA conformance is claimed.

1 / The failure

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

N = 1
observations = []
def solve(d):
    roots=[x for x in d['order'] if d['parents'].get(x)==d['parent']]
    key=lambda x:(d['labels'].get(x) is None,(d['labels'].get(x) or '').casefold())
    ordered=sorted(roots,key=key,reverse=d['descending'])
    blocks={r:[x for x in d['order'] if x==r or r in d['ancestors'].get(x,[])] for r in roots}
    closure=set(roots)
    first=min((d['order'].index(x) for x in closure),default=len(d['order']))
    prefix=[x for x in d['order'][:first] if x not in closure]
    suffix=[x for x in d['order'][first:] if x not in closure]
    result=prefix+[x for r in ordered for x in blocks[r]]+suffix
    positions={x:i+1 for i,x in enumerate(ordered)}
    return [result,positions,d['focus'],d['selected'],d['expanded']]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X1', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 2: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X2', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 3: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X3', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 4: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X4', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 5: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X5', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])]}
for label, data, expected in cases[N]:
    check(label, 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
ascending[['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'zz', 'zzz', 'q'], {'a': 1, 'b': 3, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'b': 3, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Failed
descending[['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'zz', 'zzz', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Failed
stable tie[['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'zz', 'zzz', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Failed
case fold[['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'zz', 'zzz', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Failed
empty siblings[['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]Passed
empty label[['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'zz', 'zzz', 'q'], {'a': 2, 'b': 3, 'z': 1}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'a': 2, 'b': 3, 'z': 1}, 'z', ['zzz'], ['r', 'z']]Failed

SHA-256 / 8b6f0ef346cf61deaf315b48bca33dc175fb79c7894394b608082e01f87a3d23

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(d):
    roots=[x for x in d['order'] if d['parents'].get(x)==d['parent']]
    key=lambda x:(d['labels'].get(x) is None,(d['labels'].get(x) or '').casefold())
    ordered=sorted(roots,key=key,reverse=d['descending'])
    blocks={r:[x for x in d['order'] if x==r or r in d['ancestors'].get(x,[])] for r in roots}
    closure=set(d['order'])
    first=min((d['order'].index(x) for x in closure),default=len(d['order']))
    prefix=[x for x in d['order'][:first] if x not in closure]
    suffix=[x for x in d['order'][first:] if x not in closure]
    result=prefix+[x for r in ordered for x in blocks[r]]+suffix
    positions={x:i+1 for i,x in enumerate(ordered)}
    return [result,positions,d['focus'],d['selected'],d['expanded']]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X1', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 2: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X2', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 3: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X3', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 4: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X4', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 5: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X5', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])]}
for label, data, expected in cases[N]:
    check(label, 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
ascending[['a', 'z', 'zz', 'zzz', 'b'], {'a': 1, 'b': 3, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'b': 3, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Failed
descending[['b', 'z', 'zz', 'zzz', 'a'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Failed
stable tie[['b', 'z', 'zz', 'zzz', 'a'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Failed
case fold[['b', 'z', 'zz', 'zzz', 'a'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Failed
empty siblings[[], {}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]Failed
empty label[['z', 'zz', 'zzz', 'a', 'b'], {'a': 2, 'b': 3, 'z': 1}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'a': 2, 'b': 3, 'z': 1}, 'z', ['zzz'], ['r', 'z']]Failed

SHA-256 / a8264ed335dfc8bed33f75f1ba9557c238f95f298a82c97d70f6387e61069eb3

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(d):
    roots=[x for x in d['order'] if d['parents'].get(x)==d['parent']]
    key=lambda x:(d['labels'].get(x) is None,(d['labels'].get(x) or '').casefold())
    ordered=sorted(roots,key=key,reverse=d['descending'])
    blocks={r:[x for x in d['order'] if x==r or r in d['ancestors'].get(x,[])] for r in roots}
    closure={x for block in blocks.values() for x in block}
    first=min((d['order'].index(x) for x in closure),default=len(d['order']))
    prefix=[x for x in d['order'][:first] if x not in closure]
    suffix=[x for x in d['order'][first:] if x not in closure]
    result=prefix+[x for r in ordered for x in blocks[r]]+suffix
    positions={x:i+1 for i,x in enumerate(ordered)}
    return [result,positions,d['focus'],d['selected'],d['expanded']]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X1', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 2: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X2', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 3: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X3', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 4: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X4', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])], 5: [('ascending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'z': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']]), ('descending', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': True, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('stable tie', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'SAME', 'a': 'same', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('case fold', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'Straße', 'a': 'STRASSE', 'b': 'other'}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'b': 1, 'z': 2, 'a': 3}, 'z', ['zzz'], ['r', 'z']]), ('empty siblings', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'absent', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': 'beta', 'a': 'Alpha', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]), ('empty label', {'order': ['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], 'parents': {'outside': None, 'r': None, 'z': 'r', 'zz': 'z', 'zzz': 'zz', 'a': 'r', 'b': 'r', 'q': None}, 'parent': 'r', 'ancestors': {'z': ['r'], 'zz': ['r', 'z'], 'zzz': ['r', 'z', 'zz'], 'a': ['r'], 'b': ['r']}, 'labels': {'z': '', 'a': 'X5', 'b': None}, 'descending': False, 'focus': 'z', 'selected': ['zzz'], 'expanded': ['r', 'z']}, [['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'z': 1, 'a': 2, 'b': 3}, 'z', ['zzz'], ['r', 'z']])]}
for label, data, expected in cases[N]:
    check(label, 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
ascending[['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'b': 3, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'a', 'z', 'zz', 'zzz', 'b', 'q'], {'a': 1, 'b': 3, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Passed
descending[['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Passed
stable tie[['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Passed
case fold[['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'b', 'z', 'zz', 'zzz', 'a', 'q'], {'a': 3, 'b': 1, 'z': 2}, 'z', ['zzz'], ['r', 'z']]Passed
empty siblings[['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {}, 'z', ['zzz'], ['r', 'z']]Passed
empty label[['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'a': 2, 'b': 3, 'z': 1}, 'z', ['zzz'], ['r', 'z']][['outside', 'r', 'z', 'zz', 'zzz', 'a', 'b', 'q'], {'a': 2, 'b': 3, 'z': 1}, 'z', ['zzz'], ['r', 'z']]Passed

SHA-256 / 1dcdf2de62849b93bfda5672dd139b165cddae17971fcd35a9b4914b8146c5f4

Verification & scope

Synthetic deterministic hierarchical-widget data contract; not an implementation of a browser accessibility tree. 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 2026-09-29T14:43:23.483156+00:00.

Case digest / e119a03a6277dc56ec4c240b10cbbe5b4bfdd855d4c6badc857a041b67a8b94d