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A cache namespace purge deletes similarly prefixed namespaces · case 02

A cache namespace purge deletes similarly prefixed namespaces.

Member previewVariant 2 · 3 implementations · 4 checks per implementation

Case contract

Entries are [namespace,value]. Purge exact matching namespace identities only; namespaces are already separately parsed strings.

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	`[["xuser", 3]]`	`[["users", 2], ["xuser", 3]]`	Failed

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