@Test
 public void testGet() throws Exception {
   SecurityGroup group = dao.get(2L);
   Assert.assertNotNull(group);
   Assert.assertEquals(2L, group.getId());
   Assert.assertTrue(group.getName().length() > 0);
   Assert.assertTrue(group.getDescription().length() > 0);
   Assert.assertTrue(group.getRoles().size() > 0);
 }
 @Test
 public void testSave() throws Exception {
   SecurityGroup group = new SecurityGroup();
   group.setDescription("test group");
   group.setName("name");
   group.setLeft(99);
   group.setRight(100);
   dao.save(group);
   Assert.assertTrue(group.getId() > 0);
 }