FA-37667 / Table interactions / Member archive

Sparse loaded table row slots: loaded selection id · case 02

The table loaded selection id result violates the stipulated sparse loaded table row slots contract.

Member previewVariant 2 · 3 implementations · 6 checks per implementation

Case contract

Sparse table slots retain absolute indices across unloaded pages, distinguish placeholder and stable row keys, clip loaded pages to declared total, decorate only placeholders with page loading/errors, and schedule each missing nonfailed noninflight page once.

Why this case matters

An offline table UI model isolates sparse loaded table row slots, 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
partial loaded pages	{"requests": [4], "slots": [{"index": 0, "key": ["row", "a"], "kind": "row", "row": {"id": "a"}, "selected": false}, {"index": 1, "key": ["row", "b"], "kind": "row", "row": {"id": "b"}, "selected": false}, {"error": null, "height": 9, "index": 2, "key": ["placeholder", 2], "kind": "placeholder", "loading": true}, {"error": null, "height": 9, "index": 3, "key": ["placeholder", 3], "kind": "placeholder", "loading": true}, {"index": 4, "key": ["row", "e"], "kind": "row", "row": {"id": "e", "v": 2}, "selected": false}, {"error": null, "height": 9, "index": 5, "key": ["placeholder", 5], "kind": "placeholder", "loading": false}, {"error": "failed", "height": 9, "index": 6, "key": ["placeholder", 6], "kind": "placeholder", "loading": false}]}	{"requests": [4], "slots": [{"index": 0, "key": ["row", "a"], "kind": "row", "row": {"id": "a"}, "selected": false}, {"index": 1, "key": ["row", "b"], "kind": "row", "row": {"id": "b"}, "selected": false}, {"error": null, "height": 9, "index": 2, "key": ["placeholder", 2], "kind": "placeholder", "loading": true}, {"error": null, "height": 9, "index": 3, "key": ["placeholder", 3], "kind": "placeholder", "loading": true}, {"index": 4, "key": ["row", "e"], "kind": "row", "row": {"id": "e", "v": 2}, "selected": true}, {"error": null, "height": 9, "index": 5, "key": ["placeholder", 5], "kind": "placeholder", "loading": false}, {"error": "failed", "height": 9, "index": 6, "key": ["placeholder", 6], "kind": "placeholder", "loading": false}]}	Failed

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