public void testSavingEqualExpenses() throws Exception {
   repository.save(expense);
   assertEquals(repository.size(), 1);
   try {
     expense.setExpenseID(expense.getExpenseID() + 1);
     repository.save(expense);
   } catch (MyException e) {
     assertEquals(repository.size(), 1);
   }
 }
 public void testFindByUser() {
   saveEntities();
   User u = entities.get(1).getUser();
   ArrayList<Expense> expenses;
   expenses = repositoryUtils.findByUser(u);
   assertNotNull(expenses);
   expenses = repositoryUtils.findByUser(expense.getUser());
   assertNull(expenses);
 }