@Test
 public void testGetAccountsSortedByDeposit() {
   List<Account> accountsSortedByDeposit =
       bankReportService.getAccountsSortedByDeposit(bank, true);
   Iterator<Account> iterator = accountsSortedByDeposit.iterator();
   assertEquals(3, iterator.next().getAccountNumber());
   assertEquals(2, iterator.next().getAccountNumber());
 }
 @Test
 public void testGetNumberOfOpenAccounts() {
   assertEquals(2, bankReportService.getNumberOfOpenAccounts(bank));
 }
 @Test
 public void testGetNumberOfClients() {
   assertEquals(1, bankReportService.getNumberOfClients(bank));
 }