lianetm commented on code in PR #16982:
URL: https://github.com/apache/kafka/pull/16982#discussion_r1735186029


##########
clients/src/test/java/org/apache/kafka/clients/consumer/KafkaConsumerTest.java:
##########
@@ -2507,32 +2523,33 @@ public void testCurrentLag(GroupProtocol groupProtocol) 
{
         assertEquals(OptionalLong.of(45L), consumer.currentLag(tp0));
     }
 
-    // TODO: this test triggers a bug with the CONSUMER group protocol 
implementation.
-    //       The bug will be investigated and fixed so this test can use both 
group protocols.
     @ParameterizedTest
-    @EnumSource(value = GroupProtocol.class, names = "CLASSIC")
-    public void testListOffsetShouldUpdateSubscriptions(GroupProtocol 
groupProtocol) {
+    @EnumSource(GroupProtocol.class)
+    public void testListOffsetShouldUpdateSubscriptions(GroupProtocol 
groupProtocol) throws InterruptedException {
         final ConsumerMetadata metadata = createMetadata(subscription);
         final MockClient client = new MockClient(time, metadata);
 
         initMetadata(client, singletonMap(topic, 1));
 
-        consumer = newConsumer(groupProtocol, time, client, subscription, 
metadata, assignor, true, groupInstanceId);
-
+        consumer = newConsumer(groupProtocol, time, client, subscription, 
metadata, assignor, false,
+                null, groupInstanceId, false);
         consumer.assign(singleton(tp0));
-
-        // poll once to update with the current metadata
-        consumer.poll(Duration.ofMillis(0));
-        client.respond(FindCoordinatorResponse.prepareResponse(Errors.NONE, 
groupId, metadata.fetch().nodes().get(0)));
-
         consumer.seek(tp0, 50L);
-        client.prepareResponse(listOffsetsResponse(singletonMap(tp0, 90L)));
 
+        client.prepareResponse(listOffsetsResponse(singletonMap(tp0, 90L)));
         assertEquals(singletonMap(tp0, 90L), 
consumer.endOffsets(Collections.singleton(tp0)));
         // correct lag result should be returned as well
         assertEquals(OptionalLong.of(40L), consumer.currentLag(tp0));
     }
 
+    private Optional<ClientRequest> findRequest(MockClient client, ApiKeys 
apiKey) {
+        return client.requests().stream().filter(request -> 
request.requestBuilder().apiKey().equals(apiKey)).findFirst();
+    }
+
+    private boolean requestGenerated(MockClient client, ApiKeys apiKey) {
+        return client.requests().stream().anyMatch(request -> 
request.requestBuilder().apiKey().equals(apiKey));

Review Comment:
   could we maybe reuse and simplify here to `return findRequest(client, 
apiKey).isPresent()`?



##########
clients/src/test/java/org/apache/kafka/clients/consumer/KafkaConsumerTest.java:
##########
@@ -2507,32 +2523,33 @@ public void testCurrentLag(GroupProtocol groupProtocol) 
{
         assertEquals(OptionalLong.of(45L), consumer.currentLag(tp0));
     }
 
-    // TODO: this test triggers a bug with the CONSUMER group protocol 
implementation.
-    //       The bug will be investigated and fixed so this test can use both 
group protocols.
     @ParameterizedTest
-    @EnumSource(value = GroupProtocol.class, names = "CLASSIC")
-    public void testListOffsetShouldUpdateSubscriptions(GroupProtocol 
groupProtocol) {
+    @EnumSource(GroupProtocol.class)
+    public void testListOffsetShouldUpdateSubscriptions(GroupProtocol 
groupProtocol) throws InterruptedException {

Review Comment:
   I guess we don't need this throw Interrupted here anymore?



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