chirag-wadhwa5 commented on code in PR #16916:
URL: https://github.com/apache/kafka/pull/16916#discussion_r1724504350


##########
core/src/test/scala/unit/kafka/server/GroupCoordinatorBaseRequestTest.scala:
##########
@@ -25,48 +25,14 @@ import 
org.apache.kafka.common.message.LeaveGroupResponseData.MemberResponse
 import 
org.apache.kafka.common.message.SyncGroupRequestData.SyncGroupRequestAssignment
 import org.apache.kafka.common.message.{ConsumerGroupDescribeRequestData, 
ConsumerGroupDescribeResponseData, ConsumerGroupHeartbeatRequestData, 
ConsumerGroupHeartbeatResponseData, DeleteGroupsRequestData, 
DeleteGroupsResponseData, DescribeGroupsRequestData, 
DescribeGroupsResponseData, HeartbeatRequestData, HeartbeatResponseData, 
JoinGroupRequestData, JoinGroupResponseData, LeaveGroupResponseData, 
ListGroupsRequestData, ListGroupsResponseData, OffsetCommitRequestData, 
OffsetCommitResponseData, OffsetDeleteRequestData, OffsetDeleteResponseData, 
OffsetFetchResponseData, ShareGroupDescribeRequestData, 
ShareGroupDescribeResponseData, ShareGroupHeartbeatRequestData, 
ShareGroupHeartbeatResponseData, SyncGroupRequestData, SyncGroupResponseData}
 import org.apache.kafka.common.protocol.{ApiKeys, Errors}
-import org.apache.kafka.common.requests.{AbstractRequest, AbstractResponse, 
ConsumerGroupDescribeRequest, ConsumerGroupDescribeResponse, 
ConsumerGroupHeartbeatRequest, ConsumerGroupHeartbeatResponse, 
DeleteGroupsRequest, DeleteGroupsResponse, DescribeGroupsRequest, 
DescribeGroupsResponse, HeartbeatRequest, HeartbeatResponse, JoinGroupRequest, 
JoinGroupResponse, LeaveGroupRequest, LeaveGroupResponse, ListGroupsRequest, 
ListGroupsResponse, OffsetCommitRequest, OffsetCommitResponse, 
OffsetDeleteRequest, OffsetDeleteResponse, OffsetFetchRequest, 
OffsetFetchResponse, ShareGroupDescribeRequest, ShareGroupDescribeResponse, 
ShareGroupHeartbeatRequest, ShareGroupHeartbeatResponse, SyncGroupRequest, 
SyncGroupResponse}
+import org.apache.kafka.common.requests.{ConsumerGroupDescribeRequest, 
ConsumerGroupDescribeResponse, ConsumerGroupHeartbeatRequest, 
ConsumerGroupHeartbeatResponse, DeleteGroupsRequest, DeleteGroupsResponse, 
DescribeGroupsRequest, DescribeGroupsResponse, HeartbeatRequest, 
HeartbeatResponse, JoinGroupRequest, JoinGroupResponse, LeaveGroupRequest, 
LeaveGroupResponse, ListGroupsRequest, ListGroupsResponse, OffsetCommitRequest, 
OffsetCommitResponse, OffsetDeleteRequest, OffsetDeleteResponse, 
OffsetFetchRequest, OffsetFetchResponse, ShareGroupDescribeRequest, 
ShareGroupDescribeResponse, ShareGroupHeartbeatRequest, 
ShareGroupHeartbeatResponse, SyncGroupRequest, SyncGroupResponse}
 import org.junit.jupiter.api.Assertions.{assertEquals, fail}
+import unit.kafka.server.RequestUtilitiesTest
 
 import java.util.Comparator
-import java.util.stream.Collectors
 import scala.jdk.CollectionConverters._
-import scala.reflect.ClassTag
 
-class GroupCoordinatorBaseRequestTest(cluster: ClusterInstance) {
-  private def brokers(): Seq[KafkaBroker] = 
cluster.brokers.values().stream().collect(Collectors.toList[KafkaBroker]).asScala.toSeq
-
-  private def controllerServers(): Seq[ControllerServer] = 
cluster.controllers().values().asScala.toSeq
-
-  protected def createOffsetsTopic(): Unit = {
-    TestUtils.createOffsetsTopicWithAdmin(
-      admin = cluster.createAdminClient(),
-      brokers = brokers(),
-      controllers = controllerServers()
-    )
-  }
-
-  protected def createTopic(
-    topic: String,
-    numPartitions: Int
-  ): Unit = {
-    TestUtils.createTopicWithAdmin(
-      admin = cluster.createAdminClient(),
-      brokers = brokers(),
-      controllers = controllerServers(),
-      topic = topic,
-      numPartitions = numPartitions
-    )
-  }
-
-  protected def isUnstableApiEnabled: Boolean = {
-    cluster.config.serverProperties.get("unstable.api.versions.enable") == 
"true"
-  }
-
-  protected def isNewGroupCoordinatorEnabled: Boolean = {
-    cluster.config.serverProperties.get("group.coordinator.new.enable") == 
"true" ||
-      
cluster.config.serverProperties.get("group.coordinator.rebalance.protocols").contains("consumer")
-  }
+class GroupCoordinatorBaseRequestTest(cluster: ClusterInstance) extends 
RequestUtilitiesTest(cluster) {

Review Comment:
   Thanks for the review. It is a utilities class, but as per the 
implementation of the KafkaClusterTestKit, the cluster created as part of the 
test is passed on to the parent class via the primary constructor. 
   ```class RequestUtilitiesTest(cluster: ClusterInstance) {```
   And we need this cluster instance for the other utility methods to work, 
that's why it is being inherited.



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