[jira] [Created] (FLINK-21759) Add TestMetricGroup

[Shang Yuanchun (Jira)]

Chesnay Schepler created FLINK-21759:
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             Summary: Add TestMetricGroup
                 Key: FLINK-21759
                 URL: https://issues.apache.org/jira/browse/FLINK-21759
             Project: Flink
          Issue Type: Improvement
          Components: Runtime / Metrics, Tests
            Reporter: Chesnay Schepler
            Assignee: Chesnay Schepler
             Fix For: 1.13.0


Add a customizable standalone test MetricGroup, so that tests relying on some actual MetricGroup behavior no longer have to rely on the runtime implementations.



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