@Test
    public void testAutoCommitDynamicAssignment() {
        try (ConsumerCoordinator coordinator = buildCoordinator(rebalanceConfig, new Metrics(), assignors, true, subscriptions)) {
            subscriptions.subscribe(singleton(topic1), Optional.of(rebalanceListener));
            joinAsFollowerAndReceiveAssignment(coordinator, singletonList(t1p));
            subscriptions.seek(t1p, 100);
            prepareOffsetCommitRequest(singletonMap(t1p, 100L), Errors.NONE);
            time.sleep(autoCommitIntervalMs);
            coordinator.poll(time.timer(Long.MAX_VALUE));
            assertFalse(client.hasPendingResponses());
        }
    }
Verifies that subscription change updates SubscriptionState correctly even after JoinGroup failures
that don't re-invoke onJoinPrepare.
clients/src/test/java/org/apache/kafka/clients/consumer/internals/ConsumerCoordinatorTest.java