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[tree-building] Add canonical data where there was none previously #2643

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Merged
kotp merged 3 commits into from
Apr 4, 2026
Merged

[tree-building] Add canonical data where there was none previously #2643

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169abc6
[tree-building] Add a new canonical data file
IsaacG Mar 26, 2026
2863b1b
Add a comment mentioning this is a refactoring exercise
IsaacG Mar 30, 2026
704ac26
Update formatting
IsaacG Apr 3, 2026
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300 changes: 300 additions & 0 deletions exercises/tree-building/canonical-data.json
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Original file line number Diff line number Diff line change
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{
"exercise": "tree-building",
"comments": [
"Per the description, this is a refactoring exercise.",
"The expectation is that the stub file has a poorly written but working implementation."
],
"cases": [
{
"uuid": "761790a3-4c27-461a-b4e9-8bce8ccee5a1",
"description": "empty list",
"property": "buildTree",
"input": {
"records": []
},
"expected": {}
},
{
"uuid": "dcc89dc3-eb39-4f26-a3cd-964e607c95ff",
"description": "single record",
"property": "buildTree",
"input": {
"records": [{ "recordId": 0, "parentId": 0 }]
},
"expected": {
"node": {
"id": 0,
"children": []
}
}
},
{
"uuid": "dcdb80f0-e5da-43e1-8b8d-6f307be89c0e",
"description": "three records in order",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 0, "parentId": 0 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 2, "parentId": 0 }
]
},
"expected": {
"node": {
"id": 0,
"children": [
{ "recordId": 1, "parentId": 0 },
{ "recordId": 2, "parentId": 0 }
]
}
}
},
{
"uuid": "2ff5b8f8-d95e-401e-9359-233919488d22",
"description": "three records in reverse order",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 2, "parentId": 0 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 0, "parentId": 0 }
]
},
"expected": {
"node": {
"id": 0,
"children": [
{ "recordId": 1, "parentId": 0 },
{ "recordId": 2, "parentId": 0 }
]
}
}
},
{
"uuid": "de798d3b-8905-4446-a114-a0dd2476d945",
"description": "more than two children",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 0, "parentId": 0 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 2, "parentId": 0 },
{ "recordId": 3, "parentId": 0 }
]
},
"expected": {
"node": {
"id": 0,
"children": [
{ "recordId": 1, "parentId": 0 },
{ "recordId": 2, "parentId": 0 },
{ "recordId": 3, "parentId": 0 }
]
}
}
},
{
"uuid": "13dd9b3c-6137-415f-b6fe-5044c1dfbc50",
"description": "binary tree",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 5, "parentId": 1 },
{ "recordId": 3, "parentId": 2 },
{ "recordId": 2, "parentId": 0 },
{ "recordId": 4, "parentId": 1 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 0, "parentId": 0 },
{ "recordId": 6, "parentId": 2 }
]
},
"expected": {
"node": {
"id": 0,
"children": [
{
"recordId": 1,
"children": [{ "recordId": 4 }, { "recordId": 5 }]
},
{
"recordId": 2,
"children": [{ "recordId": 3 }, { "recordId": 6 }]
}
]
}
}
},
{
"uuid": "5cfd29dc-166b-47da-84ca-1c60b5ae5941",
"description": "unbalanced tree",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 5, "parentId": 2 },
{ "recordId": 3, "parentId": 2 },
{ "recordId": 2, "parentId": 0 },
{ "recordId": 4, "parentId": 1 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 0, "parentId": 0 },
{ "recordId": 6, "parentId": 2 }
]
},
"expected": {
"node": {
"id": 0,
"children": [
{
"recordId": 1,
"children": [{ "recordId": 4 }]
},
{
"recordId": 2,
"children": [
{ "recordId": 3 },
{ "recordId": 5 },
{ "recordId": 6 }
]
}
]
}
}
},
{
"uuid": "a05ddb5d-2d11-4948-88d3-b5f18a44ddce",
"description": "one root node and has parent",
"property": "buildTree",
"input": {
"records": [{ "recordId": 0, "parentId": 1 }]
},
"expected": {
"error": "node parent_id should be smaller than its record_id"
}
},
{
"uuid": "9ed09df2-8fd6-4e37-aa37-e7753c057a1a",
"description": "root node has parent",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 0, "parentId": 1 },
{ "recordId": 1, "parentId": 0 }
]
},
"expected": {
"error": "node parent_id should be smaller than its record_id"
}
},
{
"uuid": "8755a2c4-2c6b-4396-b155-b5bf4b6bc280",
"description": "no root node",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 1, "parentId": 0 },
{ "recordId": 2, "parentId": 0 }
]
},
"expected": {
"error": "record id is invalid or out of order"
}
},
{
"uuid": "c6ef8f9a-4045-4949-a1e1-e0ae804e4af4",
"description": "duplicate node",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 0, "parentId": 0 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 1, "parentId": 0 }
]
},
"expected": {
"error": "record id is invalid or out of order"
}
},
{
"uuid": "7a7b77a6-3447-4905-b79c-d22bfe43f408",
"description": "duplicate root",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 0, "parentId": 0 },
{ "recordId": 0, "parentId": 0 }
]
},
"expected": {
"error": "record id is invalid or out of order"
}
},
{
"uuid": "c6f51bd7-3608-4390-b446-dfd1bcbf3ddc",
"description": "non-continuous",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 2, "parentId": 0 },
{ "recordId": 4, "parentId": 2 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 0, "parentId": 0 }
]
},
"expected": {
"error": "record id is invalid or out of order"
}
},
{
"uuid": "1f3d1b50-4494-4b22-b88a-68f32f7d321d",
"description": "cycle directly",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 5, "parentId": 2 },
{ "recordId": 3, "parentId": 2 },
{ "recordId": 2, "parentId": 2 },
{ "recordId": 4, "parentId": 1 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 0, "parentId": 0 },
{ "recordId": 6, "parentId": 3 }
]
},
"expected": {
"error": "record id is invalid or out of order"
}
},
{
"uuid": "ac568b50-3f9b-4cb4-b602-e0eb13de4269",
"description": "cycle indirectly",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 5, "parentId": 2 },
{ "recordId": 3, "parentId": 2 },
{ "recordId": 2, "parentId": 6 },
{ "recordId": 4, "parentId": 1 },
{ "recordId": 1, "parentId": 0 },
{ "recordId": 0, "parentId": 0 },
{ "recordId": 6, "parentId": 3 }
]
},
"expected": {
"error": "record id is invalid or out of order"
}
},
{
"uuid": "cf954b21-3cef-420c-8e72-d19547505e1f",
"description": "higher id parent of lower id",
"property": "buildTree",
"input": {
"records": [
{ "recordId": 0, "parentId": 0 },
{ "recordId": 2, "parentId": 0 },
{ "recordId": 1, "parentId": 2 }
]
},
"expected": {
"error": "record id is invalid or out of order"
}
}
]
}
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