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Batch packing drops the final partially filled batch · case 03

Batch packing drops the final partially filled batch.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Pack indivisible [id,size] rows into ordered batches under a positive byte budget. A row exceeding budget occupies its own batch. Flush before an overflowing row, permit exact fits, and omit empty batches.

Why this case matters

A bounded deterministic data engine model makes representation and changelog faults reproducible.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
reset after flush	`[[1], [2, 3]]`	`[[1], [2, 3], [4]]`	Failed

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