[PR] test(metrics): deepen Apache proxy collector coverage [rocketmq-dashboard]

["yyqdbngt (via GitHub)" <gi...@apache.org>]

yyqdbngt opened a new pull request, #3354:
URL: https://github.com/apache/rocketmq-dashboard/pull/3354

   ## Summary
   
   Extends the existing `ApacheRocketMqProxyMetricsCollectorTest` (3 to 6 tests) to pin down the proxy collector contract.
   
   Added cases:
   - `supports` accepts Apache and vendor-less instances with a name and endpoint, and rejects cloud vendors, missing endpoints, and null instances;
   - `metricKeys` exposes only `proxy.availability`;
   - discovery iterates every cluster while skipping clusters without proxies, collecting a reachable sample from the remaining cluster.
   
   ## Why
   
   The collector feeds native Apache proxy availability alerting; only probe/discovery-failure branches were covered before.
   
   ## Testing
   
   `mvn -B test -Dtest=ApacheRocketMqProxyMetricsCollectorTest` — 6/6 pass; checkstyle (validate) clean.


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Re: [PR] test(metrics): deepen Apache proxy collector coverage [rocketmq-dashboard]

["lizhimins (via GitHub)" <gi...@apache.org>]

lizhimins closed pull request #3354: test(metrics): deepen Apache proxy collector coverage
URL: https://github.com/apache/rocketmq-dashboard/pull/3354


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