@Test
  @Transactional
  public void testAddContactToGroupAndGroupConstituent() throws Exception {

    groupService.create(group);
    groupService.addAggregation(committee, group);

    Contact contact = new Contact();
    contact.setFirstName("Test Contact");
    contact.setEmail("*****@*****.**");
    contactService.create(contact);

    contactService.addContactToCommittee(contact, committee);
    contactService.addToGroup(contact, group);

    contact = contactService.findById(contact.getId());
    assertTrue(contact.getGroups().contains(group));
    assertTrue(contact.getCommittees().contains(committee));

    committee = committeeService.findById(committee.getId());
    assertTrue(committee.getMembers().contains(contact));

    group = groupService.findById(group.getId());
    assertTrue(group.getTopLevelMembers().contains(contact));
  }
  @Test
  public void testRemoveContactFromAggregation() throws Exception {
    groupService.create(group);
    groupService.addAggregation(committee, group);

    group = groupService.findById(group.getId());
    assertEquals(
        committee.getMembers().size(),
        group.getAggregations().iterator().next().getAggregationMembers().size());

    contactService.removeContactFromCommittee(first, committee);

    committee = committeeService.findById(committee.getId());
    group = groupService.findById(group.getId());
    assertEquals(
        committee.getMembers().size(),
        group.getAggregations().iterator().next().getAggregationMembers().size());
  }
  @Test
  @Transactional
  public void testAddContactToMultipleGroupsMultipleConstituents() throws Exception {

    groupService.create(group);
    groupService.addAggregation(committee, group);
    groupService.addAggregation(event, group);

    Group secondGroup = new Group();
    secondGroup.setGroupName("Second Group");
    groupService.create(secondGroup);
    groupService.addAggregation(committee, secondGroup);
    groupService.addAggregation(event, secondGroup);

    Contact contact = new Contact();
    contact.setFirstName("Test Contact");
    contact.setEmail("*****@*****.**");
    contactService.create(contact);

    contactService.addContactToCommittee(contact, committee);
    contactService.attendEvent(contact, event);
    contactService.addToGroup(contact, group);
    contactService.addToGroup(contact, secondGroup);

    contact = contactService.findById(contact.getId());
    group = groupService.findById(group.getId());
    secondGroup = groupService.findById(secondGroup.getId());
    event = eventService.findById(event.getId());
    committee = committeeService.findById(committee.getId());

    assertTrue(contact.getGroups().contains(group));
    assertTrue(contact.getGroups().contains(secondGroup));
    assertTrue(contact.getCommittees().contains(committee));
    assertTrue(contact.getAttendedEvents().contains(event));

    assertTrue(event.getAttendees().contains(contact));
    assertTrue(event.getGroups().contains(group));
    assertTrue(event.getGroups().contains(secondGroup));

    assertTrue(committee.getMembers().contains(contact));
    assertTrue(committee.getGroups().contains(group));
    assertTrue(committee.getGroups().contains(secondGroup));

    assertTrue(group.getTopLevelMembers().contains(contact));
    assertTrue(group.getAggregations().contains(committee));
    assertTrue(group.getAggregations().contains(event));

    assertTrue(secondGroup.getTopLevelMembers().contains(contact));
    assertTrue(secondGroup.getAggregations().contains(committee));
    assertTrue(secondGroup.getAggregations().contains(event));
  }