public void exampleOnRequestManual() {
ControlledPullSubscriber<Integer> puller =
new ControlledPullSubscriber<Integer>(System.out::println);
Observable.range(0, 3).doOnRequest(i -> System.out.println("Requested " + i)).subscribe(puller);
puller.requestMore(2);
puller.requestMore(1);
// Requested 0
// Requested 2
// 0
// 1
// Requested 1
// 2
}
@Test
public void testOnRequestManual() {
List<Integer> received = new ArrayList<Integer>();
List<Long> requests = new ArrayList<Long>();
ControlledPullSubscriber<Integer> puller = new ControlledPullSubscriber<Integer>(received::add);
Observable.range(0, 3).doOnRequest(requests::add).subscribe(puller);
assertEquals(Arrays.asList(0L), requests);
assertEquals(Arrays.asList(), received);
puller.requestMore(2);
assertEquals(Arrays.asList(0L, 2L), requests);
assertEquals(Arrays.asList(0, 1), received);
puller.requestMore(1);
assertEquals(Arrays.asList(0L, 2L, 1L), requests);
assertEquals(Arrays.asList(0, 1, 2), received);
}