kaisun2000 commented on issue #1418:
URL: https://github.com/apache/helix/issues/1418#issuecomment-699551282
code
```
// start controller
String controllerName = CONTROLLER_PREFIX + "_0";
_controller = new ClusterControllerManager(ZK_ADDR, CLUSTER_NAME,
controllerName);
_controller.syncStart();
Thread.sleep(1000);
// verify ideal state and external view
IdealState idealState =
_accessor.getProperty(_keyBuilder.idealStates(DB_NAME));
Assert.assertNotNull(idealState);
Assert.assertEquals(idealState.getNumPartitions(), PARTITION_NUMBER);
for (String partition : idealState.getPartitionSet()) {
List<String> preferenceList = idealState.getPreferenceList(partition);
Assert.assertNotNull(preferenceList);
Assert.assertEquals(preferenceList.size(), REPLICA_NUMBER);
}
ExternalView externalView =
_accessor.getProperty(_keyBuilder.externalView(DB_NAME));
Assert.assertNotNull(externalView);
Assert.assertEquals(externalView.getPartitionSet().size(),
PARTITION_NUMBER);
for (String partition : externalView.getPartitionSet()) {
Map<String, String> stateMap = externalView.getStateMap(partition);
Assert.assertEquals(stateMap.size(), REPLICA_NUMBER);
int masters = 0;
for (String state : stateMap.values()) {
if (state.equals(MasterSlaveSMD.States.MASTER.name())) {
++masters;
}
}
Assert.assertEquals(masters, 1);
}
```
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