FA-11234 / Media timeline seeking / Member archive

Seek buffer gap next available · case 04

A seek is accepted inside an unbuffered gap.

Member previewVariant 4 · 3 implementations · 4 checks per implementation

Case contract

Ranges are sorted disjoint nonempty half-open buffered intervals. Return target when buffered, otherwise the next range start; return None beyond all data.

Why this case matters

A deterministic local media controller stage; metadata and downloaded data are supplied explicitly. No external player, service or codec is required.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`5`	`6`	Failed

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