/**
* A reduce on an empty Observable and a seed should just pass the seed through.
*
* <p>This is confirmed at https://github.com/ReactiveX/RxJava/issues/423#issuecomment-27642456
*/
@Test
public void testReduceWithEmptyObservableAndSeed() {
Observable<Integer> observable = Observable.range(1, 0);
int value = observable.reduce(1, (t1, t2) -> t1 + t2).toBlocking().last();
assertEquals(1, value);
}
/** A reduce should fail with an NoSuchElementException if done on an empty Observable. */
@Test(expected = NoSuchElementException.class)
public void testReduceWithEmptyObservable() {
Observable<Integer> observable = Observable.range(1, 0);
observable
.reduce((t1, t2) -> t1 + t2)
.toBlocking()
.forEach(
t1 -> {
// do nothing ... we expect an exception instead
});
fail("Expected an exception to be thrown");
}
@Test
public void testRangeWithScheduler() {
TestScheduler scheduler = new TestScheduler();
Observable<Integer> observable = Observable.range(3, 4).subscribeOn(scheduler);
Subscriber<Integer> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
scheduler.advanceTimeBy(1, TimeUnit.MILLISECONDS);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext(3);
inOrder.verify(observer, times(1)).onNext(4);
inOrder.verify(observer, times(1)).onNext(5);
inOrder.verify(observer, times(1)).onNext(6);
inOrder.verify(observer, times(1)).onComplete();
inOrder.verifyNoMoreInteractions();
}