@Test
	public void findBillssByHouseholdTest() throws BillNotFoundException {
		Household hh = null;
		try {
			hh = familyService.findHousehold(0);
		} catch (InstanceNotFoundException e) {
			fail("Household not found");
		}
		billService.createBill(hh);
		assertEquals(1, hh.getBills().size());

		ArrayList<Bill> ar = new ArrayList<Bill>();
		ar.addAll(hh.getBills());

		ArrayList<Bill> ar2 = new ArrayList<Bill>();
		ar2.addAll(billService.findBillsByHousehold(hh));

		assertEquals(ar.get(0), ar2.get(0));
	}