@Test
    public void testActivationRecordsNonEmptyLog() {
        FeatureControlManager featureControl = getActivationRecords(
            MetadataVersion.IBP_3_4_IV0, Optional.empty(), true);
        assertEquals(MetadataVersion.IBP_3_4_IV0, featureControl.metadataVersion());
        assertEquals(ZkMigrationState.PRE_MIGRATION, featureControl.zkMigrationState());
    }
Test that certain controller operations finish immediately without putting an event
on the controller queue, if there is nothing to do.
metadata/src/test/java/org/apache/kafka/controller/QuorumControllerTest.java