@Test
    void testLeadershipChangesWithoutRemoteLogManagerConfiguring() {
        assertThrows(KafkaException.class, () -> {
            remoteLogManager.onLeadershipChange(
                Collections.singleton(mockPartition(leaderTopicIdPartition)), Collections.singleton(mockPartition(followerTopicIdPartition)), topicIds);
        }, "RemoteLogManager is not configured when remote storage system is enabled");
    }
The following values will be equal when the active segment gets rotated to passive and there are no new messages:
last-stable-offset = high-water-mark = log-end-offset = base-offset-of-active-segment.
This test asserts that the active log segment that was rotated after log.roll.ms are copied to remote storage.
core/src/test/java/kafka/log/remote/RemoteLogManagerTest.java