@Test
  public void basicInterfaceTest() throws Exception {
    assumeTrue(!overrideEnabled);

    assertEquals("Incorrect local datacenter ID", 0, clusterManager.getLocalDatacenterId());
    testPartitionReplicaConsistency();
    testInvalidPartitionId();
    testDatacenterDatanodeReplicas();
    assertStateEquivalency(helixCluster.getDownInstances(), helixCluster.getUpInstances());
  }
Tests all the interface methods.
@throws Exception
ambry-clustermap/src/test/java/com/github/ambry/clustermap/HelixClusterManagerTest.java