{"abstract":"Purchases in late December miss an early-January birthday window.","category":"Loyalty points ledgers","checks":7,"contract":"Input {bmonth, bday, window, bonus, purchases:[[y,m,d]] chronological}. The birthday of year Y is (Y,bmonth,bday), with Feb 29 falling back to Feb 28 in non-leap years (Gregorian rule). A purchase within window days (inclusive, either side) of the birthday of year Y-1, Y or Y+1 earns the bonus once per birthday year. Return per-purchase bonus list.","evaluation_group":"w2-loyalty-points-ledgers-birthday-bonus","failed_approach":"Checking the current and next year still misses early-January purchases for a late-December birthday.","family":"w2-loyalty-points-ledgers-birthday-bonus-neighbouring-birthday-years","id":"FA-60701","implementations":{"attempt":{"sha256":"363797eb03b74a117f1b9ff1e5cf3db657553b70283f35c17b620df069a013c0","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport datetime\nN = 1\nobservations = []\ndef solve(x):\n    def bday(y):\n        m, d = x['bmonth'], x['bday']\n        if m == 2 and d == 29 and not (y % 4 == 0 and (y % 100 != 0 or y % 400 == 0)):\n            d = 28\n        return datetime.date(y, m, d)\n    got = set()\n    out = []\n    for y, m, d in x['purchases']:\n        p = datetime.date(y, m, d)\n        award = 0\n        for yy in (y, y + 1):\n            if abs((p - bday(yy)).days) <= x['window'] and yy not in got:\n                got.add(yy)\n                award = x['bonus']\n                break\n        out.append(award)\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 11], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 8]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 29], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 801, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [801, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 21], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 12], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 9]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 30], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 2], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 802, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [802, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 22], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 13], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 10]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 28], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 803, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [803, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 23], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 14], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 11]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 29], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 2], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 804, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [804, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 24], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 15], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 12]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 30], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 805, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [805, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 25], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"4d519a74f0f8ad92b0635d04ba2979ab456998dcd338a60f1fcf174786d294b8","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport datetime\nN = 1\nobservations = []\ndef solve(x):\n    def bday(y):\n        m, d = x['bmonth'], x['bday']\n        if m == 2 and d == 29 and not (y % 4 == 0 and (y % 100 != 0 or y % 400 == 0)):\n            d = 28\n        return datetime.date(y, m, d)\n    got = set()\n    out = []\n    for y, m, d in x['purchases']:\n        p = datetime.date(y, m, d)\n        award = 0\n        for yy in (y,):\n            if abs((p - bday(yy)).days) <= x['window'] and yy not in got:\n                got.add(yy)\n                award = x['bonus']\n                break\n        out.append(award)\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 11], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 8]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 29], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 801, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [801, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 21], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 12], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 9]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 30], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 2], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 802, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [802, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 22], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 13], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 10]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 28], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 803, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [803, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 23], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 14], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 11]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 29], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 2], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 804, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [804, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 24], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 15], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 12]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 30], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 805, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [805, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 25], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"fixed":{"sha256":"c842cb4d7438dad16e02581497d87b36082a2eb5bd805aa8a6cdaa102ec8be39","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport datetime\nN = 1\nobservations = []\ndef solve(x):\n    def bday(y):\n        m, d = x['bmonth'], x['bday']\n        if m == 2 and d == 29 and not (y % 4 == 0 and (y % 100 != 0 or y % 400 == 0)):\n            d = 28\n        return datetime.date(y, m, d)\n    got = set()\n    out = []\n    for y, m, d in x['purchases']:\n        p = datetime.date(y, m, d)\n        award = 0\n        for yy in (y - 1, y, y + 1):\n            if abs((p - bday(yy)).days) <= x['window'] and yy not in got:\n                got.add(yy)\n                award = x['bonus']\n                break\n        out.append(award)\n    return out\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 11], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 8]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 29], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 801, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [801, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 21], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 12], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 9]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 30], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 2], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 802, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [802, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 22], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 13], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 10]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 28], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 803, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [803, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 23], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 14], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 11]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 29], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 2], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 804, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [804, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 24], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]], [['inside window', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2024, 6, 15], [2024, 6, 20]]}, [500, 0]], ['window edge', {'bmonth': 6, 'bday': 15, 'window': 7, 'bonus': 500, 'purchases': [[2023, 6, 22], [2023, 6, 12]]}, [500, 0]], ['year crossing', {'bmonth': 1, 'bday': 3, 'window': 7, 'bonus': 300, 'purchases': [[2023, 12, 30], [2024, 1, 5]]}, [300, 0]], ['late december birthday', {'bmonth': 12, 'bday': 30, 'window': 5, 'bonus': 250, 'purchases': [[2025, 1, 3], [2025, 12, 29]]}, [250, 250]], ['leap day', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 800, 'purchases': [[2023, 2, 28], [2024, 2, 29], [2023, 3, 1]]}, [800, 800, 0]], ['century year', {'bmonth': 2, 'bday': 29, 'window': 0, 'bonus': 805, 'purchases': [[2100, 2, 28], [2100, 3, 1]]}, [805, 0]], ['before birthday only', {'bmonth': 9, 'bday': 1, 'window': 3, 'bonus': 100, 'purchases': [[2024, 8, 25], [2024, 8, 30], [2024, 9, 3]]}, [0, 100, 0]]]]\nfor label, args, expected in fixtures[N-1]:\n    check(label, solve(args), expected)\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":"Stipulated bounded loyalty-program model with explicit toy rules; not any real program terms. 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.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"w2-loyalty-points-ledgers-birthday-bonus-neighbouring-birthday-years","generated_at":"2026-09-29T14:46:48.013362+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Member point balances, statements and the program liability depend on this ledger rule.","repair":"Check the birthdays of the previous, current and next year.","root_cause":"Only the birthday in the purchase calendar year is checked.","sha256":"f61a45bba48f402a1f03f454f9505a17eaa4e4844cc079c05d97ac8310b8ce3b","title":"Birthday bonus window: neighbouring birthday years · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":43.874,"exit_code":1,"observations":[{"actual":[500,0],"check":"inside window","expected":[500,0],"passed":true},{"actual":[500,0],"check":"window edge","expected":[500,0],"passed":true},{"actual":[300,0],"check":"year crossing","expected":[300,0],"passed":true},{"actual":[0,250],"check":"late december birthday","expected":[250,250],"passed":false},{"actual":[800,800,0],"check":"leap day","expected":[800,800,0],"passed":true},{"actual":[801,0],"check":"century year","expected":[801,0],"passed":true},{"actual":[0,100,0],"check":"before birthday only","expected":[0,100,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"inside window\", \"actual\": [500, 0], \"expected\": [500, 0], \"passed\": true}, {\"check\": \"window edge\", \"actual\": [500, 0], \"expected\": [500, 0], \"passed\": true}, {\"check\": \"year crossing\", \"actual\": [300, 0], \"expected\": [300, 0], \"passed\": true}, {\"check\": \"late december birthday\", \"actual\": [0, 250], \"expected\": [250, 250], \"passed\": false}, {\"check\": \"leap day\", \"actual\": [800, 800, 0], \"expected\": [800, 800, 0], \"passed\": true}, {\"check\": \"century year\", \"actual\": [801, 0], \"expected\": [801, 0], \"passed\": true}, {\"check\": \"before birthday only\", \"actual\": [0, 100, 0], \"expected\": [0, 100, 0], \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.605,"exit_code":1,"observations":[{"actual":[500,0],"check":"inside window","expected":[500,0],"passed":true},{"actual":[500,0],"check":"window edge","expected":[500,0],"passed":true},{"actual":[0,300],"check":"year crossing","expected":[300,0],"passed":false},{"actual":[0,250],"check":"late december birthday","expected":[250,250],"passed":false},{"actual":[800,800,0],"check":"leap day","expected":[800,800,0],"passed":true},{"actual":[801,0],"check":"century year","expected":[801,0],"passed":true},{"actual":[0,100,0],"check":"before birthday only","expected":[0,100,0],"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"inside window\", \"actual\": [500, 0], \"expected\": [500, 0], \"passed\": true}, {\"check\": \"window edge\", \"actual\": [500, 0], \"expected\": [500, 0], \"passed\": true}, {\"check\": \"year crossing\", \"actual\": [0, 300], \"expected\": [300, 0], \"passed\": false}, {\"check\": \"late december birthday\", \"actual\": [0, 250], \"expected\": [250, 250], \"passed\": false}, {\"check\": \"leap day\", \"actual\": [800, 800, 0], \"expected\": [800, 800, 0], \"passed\": true}, {\"check\": \"century year\", \"actual\": [801, 0], \"expected\": [801, 0], \"passed\": true}, {\"check\": \"before birthday only\", \"actual\": [0, 100, 0], \"expected\": [0, 100, 0], \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":42.323,"exit_code":0,"observations":[{"actual":[500,0],"check":"inside window","expected":[500,0],"passed":true},{"actual":[500,0],"check":"window edge","expected":[500,0],"passed":true},{"actual":[300,0],"check":"year crossing","expected":[300,0],"passed":true},{"actual":[250,250],"check":"late december birthday","expected":[250,250],"passed":true},{"actual":[800,800,0],"check":"leap day","expected":[800,800,0],"passed":true},{"actual":[801,0],"check":"century year","expected":[801,0],"passed":true},{"actual":[0,100,0],"check":"before birthday only","expected":[0,100,0],"passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"inside window\", \"actual\": [500, 0], \"expected\": [500, 0], \"passed\": true}, {\"check\": \"window edge\", \"actual\": [500, 0], \"expected\": [500, 0], \"passed\": true}, {\"check\": \"year crossing\", \"actual\": [300, 0], \"expected\": [300, 0], \"passed\": true}, {\"check\": \"late december birthday\", \"actual\": [250, 250], \"expected\": [250, 250], \"passed\": true}, {\"check\": \"leap day\", \"actual\": [800, 800, 0], \"expected\": [800, 800, 0], \"passed\": true}, {\"check\": \"century year\", \"actual\": [801, 0], \"expected\": [801, 0], \"passed\": true}, {\"check\": \"before birthday only\", \"actual\": [0, 100, 0], \"expected\": [0, 100, 0], \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}