@Test
public void testGetClusterMetrics() {

  ClusterMetricsInfo responseGet = interceptor.getClusterMetricsInfo();
  Assert.assertNotNull(responseGet);
  int expectedAppSubmitted = 0;
  for (int i = 0; i < NUM_SUBCLUSTER; i++) {
    expectedAppSubmitted += i;
  }
  Assert.assertEquals(expectedAppSubmitted, responseGet.getAppsSubmitted());
  // The merge operations is tested in TestRouterWebServiceUtil
}