dengziming commented on a change in pull request #10560:
URL: https://github.com/apache/kafka/pull/10560#discussion_r664191030



##########
File path: 
core/src/test/scala/unit/kafka/coordinator/group/GroupMetadataManagerTest.scala
##########
@@ -1349,6 +1357,10 @@ class GroupMetadataManagerTest {
     val topicPartition = new TopicPartition("foo", 0)
     val offset = 37
 
+    val sensor = groupMetadataManager.offsetCommitsSensor
+    val offsetCommitCount = new WindowedCount()
+    sensor.add(metrics.metricName("commit-count", "unit-test", "offset commit 
count"), offsetCommitCount)

Review comment:
       It seems that we can't get a metric from `offsetCommitsSensor` or 
`metrics`, only `Sensor` has a method `synchronized List<KafkaMetric> 
metrics()` which can get all metrics but it's package-private, do you think 
it's worthwhile to add a method in `Sensor` just for testing?




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