FA-38044 / Table interactions / Member archive

Table pane cell hit testing: header boundary · case 04

The table header boundary result violates the stipulated table pane cell hit testing contract.

Member previewVariant 4 · 3 implementations · 14 checks per implementation

Case contract

Hit testing subtracts header height, adds body scroll, applies half-open row/column extents, partitions left/right/center panes with left precedence, transforms right pinned and center-scrolled coordinates independently, and rejects coordinates outside the table viewport.

Why this case matters

An offline table UI model isolates table pane cell hit testing, 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
right pinned cell	`{"column": null, "region": "header", "row": null}`	`{"column": "d", "region": "right", "row": "r0"}`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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