Mockito Help - Problem to sort a List of mock objects.

[robson vargas]

Hi ranchers.

Im using mockito to build some unit tests, as the fallow code can show:

@Test
	public void aListOfDeliveryShouldBeSortedByStates() {
		
		Check chk = mock(Check.class);
		when(chk.getState()).thenReturn(States.NONE);

                DeliveryOperation dop = mock(Delivery.class); 
		when(dop.checkAt(States.NONE)).thenReturn(chk);

                assertNotNull(dop.checkAt(States.NONE).getState());
}

This tests work fine. But.. look the little change:

@Test
	public void aListOfDeliveryShouldBeSortedByStates() {
		List<Operation> operations = new ArrayList<Operation>();
		Check chk = mock(Check.class);
		when(chk.getState()).thenReturn(States.NONE);

                DeliveryOperation dop = mock(Delivery.class); 
		when(dop.checkAt(States.NONE)).thenReturn(chk);

                operations.add(dop); 
                operations.add(dop2); //and others.. 

                Collections.sort(operations, new Comparator<Operation>() {
	@Override
	public int compare(Operation o1, Operation o2) {
		return o1.checkAt(States.NONE).getState().ord() < o2.checkAt(States.NONE).getState().ord() ? -1 : (o1.checkAt(States.NONE).getState().ord() > o2.checkAt(States.NONE).getState().ord() ? 1 : 0);  
	}
                 });
...
}

Then i got a big NullPointerException into my compare method, in the moment that the "getState" is invoked. (o1.checkAt(States.NONE).getState() )

So i ask you, why the "getState" work if its on the test scope but fail if its on the comparator scope ?


Thanks in adv.