guozhangwang commented on a change in pull request #9836:
URL: https://github.com/apache/kafka/pull/9836#discussion_r562288355
##########
File path:
clients/src/test/java/org/apache/kafka/clients/consumer/KafkaConsumerTest.java
##########
@@ -2041,6 +2052,118 @@ public void testInvalidGroupMetadata() throws
InterruptedException {
assertThrows(IllegalStateException.class, consumer::groupMetadata);
}
+ @Test
+ public void testPollMetadata() {
+ final Time time = new MockTime();
+ final SubscriptionState subscription = new SubscriptionState(new
LogContext(), OffsetResetStrategy.EARLIEST);
+ final ConsumerMetadata metadata = createMetadata(subscription);
+ final MockClient client = new MockClient(time, metadata);
+
+ initMetadata(client, singletonMap(topic, 1));
+ final ConsumerPartitionAssignor assignor = new RoundRobinAssignor();
+
+ final KafkaConsumer<String, String> consumer =
+ newConsumer(time, client, subscription, metadata, assignor, true,
groupInstanceId);
+
+ consumer.assign(singleton(tp0));
+ consumer.seek(tp0, 50L);
+
+ final FetchInfo fetchInfo = new FetchInfo(1L, 99L, 50L, 5);
+ client.prepareResponse(fetchResponse(singletonMap(tp0, fetchInfo)));
+
+ final ConsumerRecords<String, String> records =
consumer.poll(Duration.ofMillis(1));
+ assertEquals(5, records.count());
+ assertEquals(55L, consumer.position(tp0));
+
+ // verify that the consumer computes the correct metadata based on the
fetch response
+ final ConsumerRecords.Metadata actualMetadata =
records.metadata().get(tp0);
+ assertEquals(100L, (long) actualMetadata.endOffset());
+ assertEquals(55L, (long) actualMetadata.position());
+ assertEquals(45L, (long) actualMetadata.lag());
+ consumer.close(Duration.ZERO);
+ }
+
+
+ @Test
+ public void testPollMetadataWithExtraPartitions() {
Review comment:
Cool, thanks!
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