@Test
public void exampleEquivalence() {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Object> testerJoin = new TestSubscriber<>();
TestSubscriber<Object> testerGroupJoin = new TestSubscriber<>();
Observable<Long> left = Observable.interval(100, TimeUnit.MILLISECONDS, scheduler);
Observable<Long> right = Observable.interval(100, TimeUnit.MILLISECONDS, scheduler);
left.join(
right,
i -> Observable.timer(150, TimeUnit.MILLISECONDS, scheduler),
i -> Observable.timer(0, TimeUnit.MILLISECONDS, scheduler),
(l, r) -> Tuple.create(l, r))
.take(10)
.subscribe(testerJoin);
left.groupJoin(
right,
i -> Observable.timer(150, TimeUnit.MILLISECONDS, scheduler),
i -> Observable.timer(0, TimeUnit.MILLISECONDS, scheduler),
(l, rs) -> rs.map(r -> Tuple.create(l, r)))
.flatMap(i -> i)
.take(10)
.subscribe(testerGroupJoin);
scheduler.advanceTimeTo(600, TimeUnit.MILLISECONDS);
testerJoin.assertReceivedOnNext(testerGroupJoin.getOnNextEvents());
}
@Test
public void test() {
TestSubscriber<Object> tester = new TestSubscriber<>();
TestScheduler scheduler = Schedulers.test();
Observable<Long> left = Observable.interval(100, TimeUnit.MILLISECONDS, scheduler).take(6);
Observable<Long> right = Observable.interval(200, TimeUnit.MILLISECONDS, scheduler).take(3);
left.groupJoin(
right,
i -> Observable.never(),
i -> Observable.timer(0, TimeUnit.MILLISECONDS, scheduler),
(l, rs) -> rs.toList().map(rl -> Tuple.create(l, rl)))
.flatMap(i -> i)
.subscribe(tester);
scheduler.advanceTimeTo(600, TimeUnit.MILLISECONDS);
tester.assertReceivedOnNext(
Arrays.asList(
Tuple.create(0L, Arrays.asList(0L, 1L, 2L)),
Tuple.create(1L, Arrays.asList(0L, 1L, 2L)),
Tuple.create(2L, Arrays.asList(1L, 2L)),
Tuple.create(3L, Arrays.asList(1L, 2L)),
Tuple.create(4L, Arrays.asList(2L)),
Tuple.create(5L, Arrays.asList(2L))));
}
@Test
public void testSwitchWhenInnerCompleteBeforeOuter() {
Observable<Observable<String>> source =
Observable.create(
new Observable.OnSubscribeFunc<Observable<String>>() {
@Override
public Subscription onSubscribe(Observer<? super Observable<String>> observer) {
publishNext(
observer,
10,
Observable.create(
new Observable.OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
publishNext(observer, 0, "one");
publishNext(observer, 10, "two");
publishCompleted(observer, 20);
return Subscriptions.empty();
}
}));
publishNext(
observer,
100,
Observable.create(
new Observable.OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
publishNext(observer, 0, "three");
publishNext(observer, 10, "four");
publishCompleted(observer, 20);
return Subscriptions.empty();
}
}));
publishCompleted(observer, 200);
return Subscriptions.empty();
}
});
Observable<String> sampled = Observable.create(OperationSwitch.switchDo(source));
sampled.subscribe(observer);
InOrder inOrder = inOrder(observer);
scheduler.advanceTimeTo(150, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onCompleted();
inOrder.verify(observer, times(1)).onNext("one");
inOrder.verify(observer, times(1)).onNext("two");
inOrder.verify(observer, times(1)).onNext("three");
inOrder.verify(observer, times(1)).onNext("four");
scheduler.advanceTimeTo(250, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onNext(anyString());
inOrder.verify(observer, times(1)).onCompleted();
}
@Test
public void testAfterUnsubscribeCalledThenObserverOnNextNeverCalled() {
final TestScheduler testScheduler = new TestScheduler();
@SuppressWarnings("unchecked")
final Observer<Integer> observer = mock(Observer.class);
final Subscription subscription =
Observable.just(1, 2, 3).observeOn(testScheduler).subscribe(observer);
subscription.unsubscribe();
testScheduler.advanceTimeBy(1, TimeUnit.SECONDS);
final InOrder inOrder = inOrder(observer);
inOrder.verify(observer, never()).onNext(anyInt());
inOrder.verify(observer, never()).onError(any(Exception.class));
inOrder.verify(observer, never()).onCompleted();
}
@Test
public void test() {
TestSubscriber<Long> tester = new TestSubscriber<>();
TestScheduler scheduler = Schedulers.test();
Observable.switchOnNext(
Observable.interval(100, TimeUnit.MILLISECONDS, scheduler)
.map(i -> Observable.interval(30, TimeUnit.MILLISECONDS, scheduler).map(i2 -> i)))
.distinctUntilChanged()
.subscribe(tester);
scheduler.advanceTimeBy(500, TimeUnit.MILLISECONDS);
tester.assertReceivedOnNext(Arrays.asList(0L, 1L, 2L, 3L));
tester.assertNoErrors();
assertEquals(tester.getOnCompletedEvents().size(), 0);
}
@Test
public void testReplayWithBufferSize() {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester = new TestSubscriber<>();
ConnectableObservable<Long> source =
Observable.interval(1000, TimeUnit.MILLISECONDS, scheduler).take(5).replay(2, scheduler);
source.connect();
scheduler.advanceTimeBy(4500, TimeUnit.MILLISECONDS);
source.subscribe(tester);
scheduler.triggerActions();
tester.assertReceivedOnNext(Arrays.asList(2L, 3L));
scheduler.advanceTimeBy(500, TimeUnit.MILLISECONDS);
tester.assertReceivedOnNext(Arrays.asList(2L, 3L, 4L));
}
@Test
public void testTimestamp() {
TestSubscriber<Timestamped<Long>> tester = new TestSubscriber<>();
TestScheduler scheduler = Schedulers.test();
Observable<Long> values = Observable.interval(100, TimeUnit.MILLISECONDS, scheduler);
values.take(3).timestamp(scheduler).subscribe(tester);
scheduler.advanceTimeBy(1, TimeUnit.SECONDS);
assertEquals(tester.getOnNextEvents().get(0).getTimestampMillis(), 100);
assertEquals(tester.getOnNextEvents().get(1).getTimestampMillis(), 200);
assertEquals(tester.getOnNextEvents().get(2).getTimestampMillis(), 300);
tester.assertTerminalEvent();
tester.assertNoErrors();
}
@Test
public void testSwitchIssue737() {
// https://github.com/Netflix/RxJava/issues/737
Observable<Observable<String>> source =
Observable.create(
new Observable.OnSubscribeFunc<Observable<String>>() {
@Override
public Subscription onSubscribe(Observer<? super Observable<String>> observer) {
publishNext(
observer,
0,
Observable.create(
new Observable.OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
publishNext(observer, 10, "1-one");
publishNext(observer, 20, "1-two");
// The following events will be ignored
publishNext(observer, 30, "1-three");
publishCompleted(observer, 40);
return Subscriptions.empty();
}
}));
publishNext(
observer,
25,
Observable.create(
new Observable.OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
publishNext(observer, 10, "2-one");
publishNext(observer, 20, "2-two");
publishNext(observer, 30, "2-three");
publishCompleted(observer, 40);
return Subscriptions.empty();
}
}));
publishCompleted(observer, 30);
return Subscriptions.empty();
}
});
Observable<String> sampled = Observable.create(OperationSwitch.switchDo(source));
sampled.subscribe(observer);
scheduler.advanceTimeTo(1000, TimeUnit.MILLISECONDS);
InOrder inOrder = inOrder(observer);
inOrder.verify(observer, times(1)).onNext("1-one");
inOrder.verify(observer, times(1)).onNext("1-two");
inOrder.verify(observer, times(1)).onNext("2-one");
inOrder.verify(observer, times(1)).onNext("2-two");
inOrder.verify(observer, times(1)).onNext("2-three");
inOrder.verify(observer, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testMultipleObservers() {
Observer<Object> o1 = mock(Observer.class);
Observer<Object> o2 = mock(Observer.class);
TestScheduler s = new TestScheduler();
Observable<Long> timer = Observable.interval(500, TimeUnit.MILLISECONDS, s).take(2);
Observable<Long> o = Observable.concat(timer, timer);
o.subscribe(o1);
o.subscribe(o2);
InOrder inOrder1 = inOrder(o1);
InOrder inOrder2 = inOrder(o2);
s.advanceTimeBy(500, TimeUnit.MILLISECONDS);
inOrder1.verify(o1, times(1)).onNext(0L);
inOrder2.verify(o2, times(1)).onNext(0L);
s.advanceTimeBy(500, TimeUnit.MILLISECONDS);
inOrder1.verify(o1, times(1)).onNext(1L);
inOrder2.verify(o2, times(1)).onNext(1L);
s.advanceTimeBy(500, TimeUnit.MILLISECONDS);
inOrder1.verify(o1, times(1)).onNext(0L);
inOrder2.verify(o2, times(1)).onNext(0L);
s.advanceTimeBy(500, TimeUnit.MILLISECONDS);
inOrder1.verify(o1, times(1)).onNext(1L);
inOrder2.verify(o2, times(1)).onNext(1L);
inOrder1.verify(o1, times(1)).onCompleted();
inOrder2.verify(o2, times(1)).onCompleted();
verify(o1, never()).onError(any(Throwable.class));
verify(o2, never()).onError(any(Throwable.class));
}
private <T> void publishCompleted(final Observer<T> observer, long delay) {
scheduler.schedule(
new Action1<Inner>() {
@Override
public void call(Inner inner) {
observer.onCompleted();
}
},
delay,
TimeUnit.MILLISECONDS);
}
private <T> void publishError(final Observer<T> observer, long delay, final Throwable error) {
scheduler.schedule(
new Action1<Inner>() {
@Override
public void call(Inner inner) {
observer.onError(error);
}
},
delay,
TimeUnit.MILLISECONDS);
}
private <T> void publishNext(final Observer<T> observer, long delay, final T value) {
scheduler.schedule(
new Action1<Inner>() {
@Override
public void call(Inner inner) {
observer.onNext(value);
}
},
delay,
TimeUnit.MILLISECONDS);
}
@Test
public void testReplayWithTime() throws InterruptedException {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester = new TestSubscriber<>();
ConnectableObservable<Long> source =
Observable.interval(1000, TimeUnit.MILLISECONDS, scheduler)
.take(5)
.replay(2000, TimeUnit.MILLISECONDS, scheduler);
source.connect();
scheduler.advanceTimeBy(4500, TimeUnit.MILLISECONDS);
source.subscribe(tester);
tester.assertReceivedOnNext(Arrays.asList(2L, 3L));
scheduler.advanceTimeBy(500, TimeUnit.MILLISECONDS);
tester.assertReceivedOnNext(Arrays.asList(2L, 3L, 4L));
// 2
// 3
// 4
}
@Test
public void testDelayedErrorDeliveryWhenSafeSubscriberUnsubscribes() {
TestScheduler testScheduler = new TestScheduler();
Observable<Integer> source =
Observable.concat(Observable.<Integer>error(new TestException()), Observable.just(1));
@SuppressWarnings("unchecked")
Observer<Integer> o = mock(Observer.class);
InOrder inOrder = inOrder(o);
source.observeOn(testScheduler).subscribe(o);
inOrder.verify(o, never()).onError(any(TestException.class));
testScheduler.advanceTimeBy(1, TimeUnit.SECONDS);
inOrder.verify(o).onError(any(TestException.class));
inOrder.verify(o, never()).onNext(anyInt());
inOrder.verify(o, never()).onCompleted();
}
@Test
public void observeSameOnMultipleSchedulers() {
TestScheduler scheduler1 = new TestScheduler();
TestScheduler scheduler2 = new TestScheduler();
Observable<Integer> o = Observable.just(1, 2, 3);
Observable<Integer> o1 = o.observeOn(scheduler1);
Observable<Integer> o2 = o.observeOn(scheduler2);
@SuppressWarnings("unchecked")
Observer<Object> observer1 = mock(Observer.class);
@SuppressWarnings("unchecked")
Observer<Object> observer2 = mock(Observer.class);
InOrder inOrder1 = inOrder(observer1);
InOrder inOrder2 = inOrder(observer2);
o1.subscribe(observer1);
o2.subscribe(observer2);
scheduler1.advanceTimeBy(1, TimeUnit.SECONDS);
scheduler2.advanceTimeBy(1, TimeUnit.SECONDS);
inOrder1.verify(observer1, times(1)).onNext(1);
inOrder1.verify(observer1, times(1)).onNext(2);
inOrder1.verify(observer1, times(1)).onNext(3);
inOrder1.verify(observer1, times(1)).onCompleted();
verify(observer1, never()).onError(any(Throwable.class));
inOrder1.verifyNoMoreInteractions();
inOrder2.verify(observer2, times(1)).onNext(1);
inOrder2.verify(observer2, times(1)).onNext(2);
inOrder2.verify(observer2, times(1)).onNext(3);
inOrder2.verify(observer2, times(1)).onCompleted();
verify(observer2, never()).onError(any(Throwable.class));
inOrder2.verifyNoMoreInteractions();
}
@Test
public void testReplay() throws InterruptedException {
TestScheduler scheduler = Schedulers.test();
TestSubscriber<Long> tester1 = new TestSubscriber<>();
TestSubscriber<Long> tester2 = new TestSubscriber<>();
ConnectableObservable<Long> cold =
Observable.interval(200, TimeUnit.MILLISECONDS, scheduler).replay();
Subscription connection = cold.connect();
cold.subscribe(tester1);
scheduler.advanceTimeBy(700, TimeUnit.MILLISECONDS);
tester1.assertReceivedOnNext(Arrays.asList(0L, 1L, 2L));
tester2.assertReceivedOnNext(Arrays.asList());
cold.subscribe(tester2);
tester1.assertReceivedOnNext(Arrays.asList(0L, 1L, 2L));
tester2.assertReceivedOnNext(Arrays.asList(0L, 1L, 2L));
scheduler.advanceTimeBy(500, TimeUnit.MILLISECONDS);
tester1.assertReceivedOnNext(Arrays.asList(0L, 1L, 2L, 3L, 4L, 5L));
tester2.assertReceivedOnNext(Arrays.asList(0L, 1L, 2L, 3L, 4L, 5L));
connection.unsubscribe();
}
@Test
public void testSample() {
Observable<Long> source =
Observable.create(
new Observable.OnSubscribeFunc<Long>() {
@Override
public Subscription onSubscribe(final Observer<? super Long> observer1) {
scheduler.schedule(
new Action0() {
@Override
public void call() {
observer1.onNext(1L);
}
},
1,
TimeUnit.SECONDS);
scheduler.schedule(
new Action0() {
@Override
public void call() {
observer1.onNext(2L);
}
},
2,
TimeUnit.SECONDS);
scheduler.schedule(
new Action0() {
@Override
public void call() {
observer1.onCompleted();
}
},
3,
TimeUnit.SECONDS);
return Subscriptions.empty();
}
});
Observable<Long> sampled =
Observable.create(OperationSample.sample(source, 400L, TimeUnit.MILLISECONDS, scheduler));
sampled.subscribe(observer);
InOrder inOrder = inOrder(observer);
scheduler.advanceTimeTo(800L, TimeUnit.MILLISECONDS);
verify(observer, never()).onNext(any(Long.class));
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(1200L, TimeUnit.MILLISECONDS);
inOrder.verify(observer, times(1)).onNext(1L);
verify(observer, never()).onNext(2L);
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(1600L, TimeUnit.MILLISECONDS);
inOrder.verify(observer, times(1)).onNext(1L);
verify(observer, never()).onNext(2L);
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(2000L, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onNext(1L);
inOrder.verify(observer, times(1)).onNext(2L);
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(3000L, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onNext(1L);
inOrder.verify(observer, times(2)).onNext(2L);
verify(observer, times(1)).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
}
@Test
public void testRefCount() {
TestScheduler s = new TestScheduler();
Observable<Long> interval =
Observable.interval(100, TimeUnit.MILLISECONDS, s).publish().refCount();
// subscribe list1
final List<Long> list1 = new ArrayList<Long>();
Subscription s1 =
interval.subscribe(
new Action1<Long>() {
@Override
public void call(Long t1) {
list1.add(t1);
}
});
s.advanceTimeBy(200, TimeUnit.MILLISECONDS);
assertEquals(2, list1.size());
assertEquals(0L, list1.get(0).longValue());
assertEquals(1L, list1.get(1).longValue());
// subscribe list2
final List<Long> list2 = new ArrayList<Long>();
Subscription s2 =
interval.subscribe(
new Action1<Long>() {
@Override
public void call(Long t1) {
list2.add(t1);
}
});
s.advanceTimeBy(300, TimeUnit.MILLISECONDS);
// list 1 should have 5 items
assertEquals(5, list1.size());
assertEquals(2L, list1.get(2).longValue());
assertEquals(3L, list1.get(3).longValue());
assertEquals(4L, list1.get(4).longValue());
// list 2 should only have 3 items
assertEquals(3, list2.size());
assertEquals(2L, list2.get(0).longValue());
assertEquals(3L, list2.get(1).longValue());
assertEquals(4L, list2.get(2).longValue());
// unsubscribe list1
s1.unsubscribe();
// advance further
s.advanceTimeBy(300, TimeUnit.MILLISECONDS);
// list 1 should still have 5 items
assertEquals(5, list1.size());
// list 2 should have 6 items
assertEquals(6, list2.size());
assertEquals(5L, list2.get(3).longValue());
assertEquals(6L, list2.get(4).longValue());
assertEquals(7L, list2.get(5).longValue());
// unsubscribe list2
s2.unsubscribe();
// advance further
s.advanceTimeBy(1000, TimeUnit.MILLISECONDS);
// subscribing a new one should start over because the source should have been unsubscribed
// subscribe list3
final List<Long> list3 = new ArrayList<Long>();
Subscription s3 =
interval.subscribe(
new Action1<Long>() {
@Override
public void call(Long t1) {
list3.add(t1);
}
});
s.advanceTimeBy(200, TimeUnit.MILLISECONDS);
assertEquals(2, list3.size());
assertEquals(0L, list3.get(0).longValue());
assertEquals(1L, list3.get(1).longValue());
}
@Test
public void testSwitchWithSubsequenceError() {
Observable<Observable<String>> source =
Observable.create(
new Observable.OnSubscribeFunc<Observable<String>>() {
@Override
public Subscription onSubscribe(Observer<? super Observable<String>> observer) {
publishNext(
observer,
50,
Observable.create(
new Observable.OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
publishNext(observer, 50, "one");
publishNext(observer, 100, "two");
return Subscriptions.empty();
}
}));
publishNext(
observer,
130,
Observable.create(
new Observable.OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
publishError(observer, 0, new TestException());
return Subscriptions.empty();
}
}));
publishNext(
observer,
150,
Observable.create(
new Observable.OnSubscribeFunc<String>() {
@Override
public Subscription onSubscribe(Observer<? super String> observer) {
publishNext(observer, 50, "three");
return Subscriptions.empty();
}
}));
return Subscriptions.empty();
}
});
Observable<String> sampled = Observable.create(OperationSwitch.switchDo(source));
sampled.subscribe(observer);
InOrder inOrder = inOrder(observer);
scheduler.advanceTimeTo(90, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onNext(anyString());
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(125, TimeUnit.MILLISECONDS);
inOrder.verify(observer, times(1)).onNext("one");
verify(observer, never()).onCompleted();
verify(observer, never()).onError(any(Throwable.class));
scheduler.advanceTimeTo(250, TimeUnit.MILLISECONDS);
inOrder.verify(observer, never()).onNext("three");
verify(observer, never()).onCompleted();
verify(observer, times(1)).onError(any(TestException.class));
}