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Observable client resource cache: Stale data remains visible · case 04

Stale data remains visible.

Member previewVariant 4 · 3 implementations · 60 checks per implementation

Case contract

Client cache presence is independent of payload truthiness. Stale data remains visible during background refresh; first-load status requires absent data. Observers retain resources, and invalidation is idempotent per key. Operation stale-data-remains-visible has the six explicit input/output oracles below.

Why this case matters

An offline client lifecycle model that isolates a state-management defect without DOM rendering or network services.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
stale-data-remains-visible scenario 1	`null`	`4`	Failed

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