@Test
public void testContainerOrdering(){
List<RMContainer> containers = new ArrayList<RMContainer>();
ApplicationAttemptId appAttId = ApplicationAttemptId.newInstance(
ApplicationId.newInstance(TS, 10), 0);
RMContainer rm1 = mockContainer(appAttId, 5, mock(Resource.class), 3);
RMContainer rm2 = mockContainer(appAttId, 3, mock(Resource.class), 3);
RMContainer rm3 = mockContainer(appAttId, 2, mock(Resource.class), 2);
RMContainer rm4 = mockContainer(appAttId, 1, mock(Resource.class), 2);
RMContainer rm5 = mockContainer(appAttId, 4, mock(Resource.class), 1);
containers.add(rm3);
containers.add(rm2);
containers.add(rm1);
containers.add(rm5);
containers.add(rm4);
FifoCandidatesSelector.sortContainers(containers);
assert containers.get(0).equals(rm1);
assert containers.get(1).equals(rm2);
assert containers.get(2).equals(rm3);
assert containers.get(3).equals(rm4);
assert containers.get(4).equals(rm5);
}