model.pickup(truck, pack1, TimeLapseFactory.create(0, 1));
assertTrue(model.getContents(truck).isEmpty());
assertEquals(model.getContentsSize(truck), 0, EPSILON);
truck.tick(TimeLapseFactory.create(1, 10));
assertFalse(model.getContents(truck).isEmpty());
assertTrue(model.getContents(truck).contains(pack1));
assertEquals(model.getContentsSize(truck), 2, EPSILON);
}