@Test public void streamFetch() { Fetch fetch = new Fetch(); @SuppressWarnings("unchecked") Consumer<List<Entity>> consumer = Mockito.mock(Consumer.class); entityListenerRepositoryDecorator.forEachBatched(fetch, consumer, 543); Mockito.verify(decoratedRepository, Mockito.times(1)).forEachBatched(fetch, consumer, 543); }