@Test
public void testEnableClusterBalance() {
final boolean useClusterSetting = randomBoolean();
final Rebalance allowedOnes = RandomPicks.randomFrom(getRandom(), EnumSet.of(Rebalance.PRIMARIES, Rebalance.REPLICAS, Rebalance.ALL));
Settings build = settingsBuilder()
.put(CLUSTER_ROUTING_REBALANCE_ENABLE, useClusterSetting ? Rebalance.NONE: RandomPicks.randomFrom(getRandom(), Rebalance.values())) // index settings override cluster settings
.put(ConcurrentRebalanceAllocationDecider.CLUSTER_ROUTING_ALLOCATION_CLUSTER_CONCURRENT_REBALANCE, 3)
.build();
NodeSettingsService nodeSettingsService = new NodeSettingsService(build);