FA-11085 / Media playlist state / Member archive
History back consumes last entry · case 05
Returning the newest history item without removing it traps repeated back operations.
Case contract
History is oldest-to-newest played entry IDs. Back consumes the newest history item as current; empty history retains current.
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 fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| fixture 1 | [["a", "b"], "b"] | [["a"], "b"] | Failed |
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