FA-11103 / Media playlist state / Member archive

Shuffle preserves playing head · case 03

Shuffling replaces the playing entry with the first random candidate.

Member previewVariant 3 · 3 implementations · 4 checks per implementation

Case contract

Permutation contains every original index once. A deterministic shuffle places current first and remaining entries in permutation order without duplication.

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	`["c", "a", "b"]`	`["b", "c", "a"]`	Failed

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