showuon commented on code in PR #15133:
URL: https://github.com/apache/kafka/pull/15133#discussion_r1461840656


##########
core/src/test/scala/kafka/server/KafkaRequestHandlerTest.scala:
##########
@@ -245,403 +251,438 @@ class KafkaRequestHandlerTest {
   @ParameterizedTest
   @ValueSource(booleans = Array(true, false))
   def testSingularCopyLagBytesMetric(systemRemoteStorageEnabled: Boolean): 
Unit = {
-    val brokerTopicMetrics = 
setupBrokerTopicMetrics(systemRemoteStorageEnabled)
+    val props = kafka.utils.TestUtils.createDummyBrokerConfig()
+    
props.setProperty(RemoteLogManagerConfig.REMOTE_LOG_STORAGE_SYSTEM_ENABLE_PROP, 
systemRemoteStorageEnabled.toString)
+    val brokerTopicStats = new 
BrokerTopicStats(java.util.Optional.of(KafkaConfig.fromProps(props)))
+    val brokerTopicMetrics = brokerTopicStats.topicStats(topic)
 
     if (systemRemoteStorageEnabled) {
-      brokerTopicMetrics.recordRemoteCopyLagBytes(0, 100);
-      brokerTopicMetrics.recordRemoteCopyLagBytes(1, 150);
-      brokerTopicMetrics.recordRemoteCopyLagBytes(2, 250);
+      brokerTopicStats.recordRemoteCopyLagBytes(topic, 0, 100)
+      brokerTopicStats.recordRemoteCopyLagBytes(topic, 1, 150)
+      brokerTopicStats.recordRemoteCopyLagBytes(topic, 2, 250)
       assertEquals(500, brokerTopicMetrics.remoteCopyLagBytes)
+      assertEquals(500, brokerTopicStats.allTopicsStats.remoteCopyLagBytes)
+      brokerTopicStats.recordRemoteCopyLagBytes(topic2, 0, 100)
+      assertEquals(600, brokerTopicStats.allTopicsStats.remoteCopyLagBytes)
     } else {
       assertEquals(None, 
brokerTopicMetrics.metricGaugeMap.get(RemoteStorageMetrics.REMOTE_COPY_LAG_BYTES_METRIC.getName))
+      assertEquals(None, 
brokerTopicStats.allTopicsStats.metricGaugeMap.get(RemoteStorageMetrics.REMOTE_COPY_LAG_BYTES_METRIC.getName))
     }

Review Comment:
   Update the `KafkaRequestHandlerTest` to add allTopic metrics verification.



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