@Test
public void testIsClusterConfigEnabled() {

  boolean autoScaling = HelixUtils
      .isClusterConfigEnabled(_helixZkManager, Constants.AUTO_SCALING);
  Assert.assertTrue(autoScaling);
  HelixUtils.updateClusterConfig(_helixZkManager, Constants.AUTO_BALANCING, Constants.DISABLE);
  boolean autoBalancing = HelixUtils
      .isClusterConfigEnabled(_helixZkManager, Constants.AUTO_BALANCING);
  Assert.assertTrue(!autoBalancing);
}