@Test
public void testRemoveAggregation() throws Exception {
String id = groupService.create(group);
groupService.addAggregation(committee, group);
Group fromDb = groupService.findById(id);
assertEquals(1, fromDb.getAggregations().size());
assertEquals(1, fromDb.getAggregations().iterator().next().getGroups().size());
Aggregation aggregation = committeeService.findById(committee.getId());
assertEquals(1, aggregation.getGroups().size());
groupService.removeAggregation(committee, fromDb);
fromDb = groupService.findById(id);
assertEquals(0, fromDb.getAggregations().size());
aggregation = committeeService.findById(committee.getId());
assertEquals(0, aggregation.getGroups().size());
}
