FA-36978 / Table interactions / Member archive

Grouped table header runs: group leading leaf · case 03

The table group leading leaf result violates the stipulated grouped table header runs contract.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

Construct contiguous visible leaf runs keyed by exact group and pane, retaining leaf order and width sums. A missing group is a blank placeholder; an empty group string is an actual named group. Group resize handles require at least two visible leaves.

Why this case matters

An offline table UI model isolates grouped table header runs, including adversarial row/column relationships.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
contiguous group	`[{"blank": false, "first": "b", "group": "G", "last": "b", "leaf_ids": ["a", "b"], "pane": "center", "resizable": true, "span": 2, "width": 9}, {"blank": false, "first": "c", "group": "H", "last": "c", "leaf_ids": ["c"], "pane": "center", "resizable": false, "span": 1, "width": 4}]`	`[{"blank": false, "first": "a", "group": "G", "last": "b", "leaf_ids": ["a", "b"], "pane": "center", "resizable": true, "span": 2, "width": 9}, {"blank": false, "first": "c", "group": "H", "last": "c", "leaf_ids": ["c"], "pane": "center", "resizable": false, "span": 1, "width": 4}]`	Failed

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