@Test public void testFindUpgrade() throws Exception {
  List items=dao.findUpgrades(clusterId.longValue());
  assertTrue(items.size() > 0);
  UpgradeEntity entity=dao.findUpgrade(items.get(0).getId().longValue());
  assertNotNull(entity);
  assertEquals(1,entity.getUpgradeGroups().size());
  UpgradeGroupEntity group=dao.findUpgradeGroup(entity.getUpgradeGroups().get(0).getId().longValue());
  assertNotNull(group);
  Assert.assertNotSame(entity.getUpgradeGroups().get(0),group);
  assertEquals("group_name",group.getName());
  assertEquals("group title",group.getTitle());
}