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Zero weight upstreams never receive traffic · case 04

Zero weight upstreams never receive traffic.

Member previewVariant 4 · 3 implementations · 4 checks per implementation

Case contract

Bounded offline decision model: zero weight upstreams never receive traffic. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.

Why this case matters

This deterministic network routing model isolates the zero-weight-upstreams-never-receive-traffic policy at a network component boundary.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`[0, 1, 2]`	`[1]`	Failed

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