/** * 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(); }