@Test
  public void testGetService() throws Exception {
    ServiceInfo service = metaInfo.getService(STACK_NAME_HDP, STACK_VERSION_HDP, SERVICE_NAME_HDFS);
    Assert.assertEquals(service.getName(), SERVICE_NAME_HDFS);
    try {
      metaInfo.getService(STACK_NAME_HDP, STACK_VERSION_HDP, NON_EXT_VALUE);
    } catch (StackAccessException e) {
    }

  }
Make sure global mapping is avaliable when global.xml is
in the path.
ambari-server/src/test/java/org/apache/ambari/server/api/services/AmbariMetaInfoTest.java