@Before
  public void setupMock() {
    mockClock = mock(TimeProvider.class);
    mockAuditor = mock(OOBAuditor.class);
    mockScheduler = mock(AuditScheduler.class);
    mockCacheFacade = mock(CacheOperationFacade.class);
  }
UnitTests for AutoBalancer. All collaborators should be mocked.
geode-rebalancer/src/test/java/org/apache/geode/cache/util/AutoBalancerJUnitTest.java