FA-10517 / Caching / Member archive

A sliding cache read moves the deadline even when the entry has already expired · case 02

A sliding cache read moves the deadline even when the entry has already expired.

Member previewVariant 2 · 3 implementations · 5 checks per implementation

Case contract

For a physical hit strictly before exclusive expiration, set deadline to now plus nonnegative TTL. Misses and already expired records preserve their old deadline; this operation only computes the deadline.

Why this case matters

A deterministic cache state transformation. Inputs are copied or treated as immutable; no remote storage, real clock, or concurrent interleaving is simulated.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`16`	`10`	Failed

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