@Test
public void onlyFirstShouldSubscribeAndLastUnsubscribe() {
final AtomicInteger subscriptionCount = new AtomicInteger();
final AtomicInteger unsubscriptionCount = new AtomicInteger();
Observable<Integer> observable =
Observable.create(
new Observable.OnSubscribeFunc<Integer>() {
@Override
public Subscription onSubscribe(Observer<? super Integer> observer) {
subscriptionCount.incrementAndGet();
return Subscriptions.create(
new Action0() {
@Override
public void call() {
unsubscriptionCount.incrementAndGet();
}
});
}
});
Observable<Integer> refCounted = observable.publish().refCount();
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
Subscription first = refCounted.subscribe(observer);
assertEquals(1, subscriptionCount.get());
Subscription second = refCounted.subscribe(observer);
assertEquals(1, subscriptionCount.get());
first.unsubscribe();
assertEquals(0, unsubscriptionCount.get());
second.unsubscribe();
assertEquals(1, unsubscriptionCount.get());
}
@Test
public void testDefer() throws Throwable {
Supplier<Observable<String>> factory = mock(Supplier.class);
Observable<String> firstObservable = Observable.just("one", "two");
Observable<String> secondObservable = Observable.just("three", "four");
when(factory.get()).thenReturn(firstObservable, secondObservable);
Observable<String> deferred = Observable.defer(factory);
verifyZeroInteractions(factory);
Subscriber<String> firstObserver = TestHelper.mockSubscriber();
deferred.subscribe(firstObserver);
verify(factory, times(1)).get();
verify(firstObserver, times(1)).onNext("one");
verify(firstObserver, times(1)).onNext("two");
verify(firstObserver, times(0)).onNext("three");
verify(firstObserver, times(0)).onNext("four");
verify(firstObserver, times(1)).onComplete();
Subscriber<String> secondObserver = TestHelper.mockSubscriber();
deferred.subscribe(secondObserver);
verify(factory, times(2)).get();
verify(secondObserver, times(0)).onNext("one");
verify(secondObserver, times(0)).onNext("two");
verify(secondObserver, times(1)).onNext("three");
verify(secondObserver, times(1)).onNext("four");
verify(secondObserver, times(1)).onComplete();
}
@Test
public void testAlreadyUnsubscribedInterleavesWithClient() {
ReplaySubject<Integer> source = ReplaySubject.create();
Subscriber<Integer> done = Subscribers.empty();
done.unsubscribe();
@SuppressWarnings("unchecked")
Observer<Integer> o = mock(Observer.class);
InOrder inOrder = inOrder(o);
Observable<Integer> result = source.publish().refCount();
result.subscribe(o);
source.onNext(1);
result.subscribe(done);
source.onNext(2);
source.onCompleted();
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(2);
inOrder.verify(o).onCompleted();
verify(o, never()).onError(any(Throwable.class));
}
@Test
public void testAlreadyUnsubscribedClient() {
Subscriber<Integer> done = Subscribers.empty();
done.unsubscribe();
@SuppressWarnings("unchecked")
Observer<Integer> o = mock(Observer.class);
Observable<Integer> result = Observable.just(1).publish().refCount();
result.subscribe(done);
result.subscribe(o);
verify(o).onNext(1);
verify(o).onCompleted();
verify(o, never()).onError(any(Throwable.class));
}
@Test
public void testAssert() {
Observable<Integer> oi = Observable.from(Arrays.asList(1, 2));
TestSubscriber<Integer> o = new TestSubscriber<Integer>();
oi.subscribe(o);
o.assertReceivedOnNext(Arrays.asList(1, 2));
assertEquals(2, o.getOnNextEvents().size());
o.assertTerminalEvent();
}
@Test
public void testIgnoreElements() {
Observable<Integer> observable = Observable.just(1, 2, 3).ignoreElements();
Subscriber<Object> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
verify(observer, never()).onNext(any(Integer.class));
verify(observer, never()).onError(any(Throwable.class));
verify(observer, times(1)).onComplete();
}
@Test
public void testContainsWithEmptyObservable() {
Observable<Boolean> observable = Observable.<String>empty().contains("a");
Subscriber<Object> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
verify(observer, times(1)).onNext(false);
verify(observer, never()).onNext(true);
verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
verify(observer, times(1)).onComplete();
}
@Test
public void testCacheWithCapacity() throws InterruptedException {
final AtomicInteger counter = new AtomicInteger();
Observable<String> o =
Observable.<String>create(
observer -> {
observer.onSubscribe(EmptySubscription.INSTANCE);
new Thread(
() -> {
counter.incrementAndGet();
observer.onNext("one");
observer.onComplete();
})
.start();
})
.cache(1);
// we then expect the following 2 subscriptions to get that same value
final CountDownLatch latch = new CountDownLatch(2);
// subscribe once
o.subscribe(
v -> {
assertEquals("one", v);
latch.countDown();
});
// subscribe again
o.subscribe(
v -> {
assertEquals("one", v);
latch.countDown();
});
if (!latch.await(1000, TimeUnit.MILLISECONDS)) {
fail("subscriptions did not receive values");
}
assertEquals(1, counter.get());
}
@Test
public void testMaterializeDematerializeChaining() {
Observable<Integer> obs = Observable.just(1);
Observable<Integer> chained = obs.materialize().dematerialize();
Subscriber<Integer> observer = TestHelper.mockSubscriber();
chained.subscribe(observer);
verify(observer, times(1)).onNext(1);
verify(observer, times(1)).onComplete();
verify(observer, times(0)).onError(any(Throwable.class));
}
@Test
public void testWrappingMock() {
Observable<Integer> oi = Observable.from(Arrays.asList(1, 2));
@SuppressWarnings("unchecked")
Observer<Integer> mockObserver = mock(Observer.class);
oi.subscribe(new TestSubscriber<Integer>(mockObserver));
InOrder inOrder = inOrder(mockObserver);
inOrder.verify(mockObserver, times(1)).onNext(1);
inOrder.verify(mockObserver, times(1)).onNext(2);
inOrder.verify(mockObserver, times(1)).onCompleted();
inOrder.verifyNoMoreInteractions();
}
@Test
public void testAssertNotMatchValue() {
Observable<Integer> oi = Observable.from(Arrays.asList(1, 2));
TestSubscriber<Integer> o = new TestSubscriber<Integer>();
oi.subscribe(o);
thrown.expect(AssertionError.class);
thrown.expectMessage("Value at index: 1 expected to be [3] (Integer) but was: [2] (Integer)");
o.assertReceivedOnNext(Arrays.asList(1, 3));
assertEquals(2, o.getOnNextEvents().size());
o.assertTerminalEvent();
}
@Test
public void testAssertNotMatchCount() {
Observable<Integer> oi = Observable.from(Arrays.asList(1, 2));
TestSubscriber<Integer> o = new TestSubscriber<Integer>();
oi.subscribe(o);
thrown.expect(AssertionError.class);
thrown.expectMessage("Number of items does not match. Provided: 1 Actual: 2");
o.assertReceivedOnNext(Arrays.asList(1));
assertEquals(2, o.getOnNextEvents().size());
o.assertTerminalEvent();
}
@Test
public void testContainsWithInexistence() {
Observable<Boolean> observable =
Observable.just("a", "b").contains("c"); // FIXME null values are not allowed, removed
Subscriber<Object> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
verify(observer, times(1)).onNext(false);
verify(observer, never()).onNext(true);
verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
verify(observer, times(1)).onComplete();
}
@Test
public void testContains() {
Observable<Boolean> observable =
Observable.just("a", "b", "c").contains("b"); // FIXME nulls not allowed, changed to "c"
Subscriber<Boolean> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
verify(observer, times(1)).onNext(true);
verify(observer, never()).onNext(false);
verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
verify(observer, times(1)).onComplete();
}
@Test
@Ignore("null values are not allowed")
public void testContainsWithNull() {
Observable<Boolean> observable = Observable.just("a", "b", null).contains(null);
Subscriber<Object> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
verify(observer, times(1)).onNext(true);
verify(observer, never()).onNext(false);
verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
verify(observer, times(1)).onComplete();
}
@Test
public void testOfType() {
Observable<String> observable = Observable.just(1, "abc", false, 2L).ofType(String.class);
Subscriber<Object> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
verify(observer, never()).onNext(1);
verify(observer, times(1)).onNext("abc");
verify(observer, never()).onNext(false);
verify(observer, never()).onNext(2L);
verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
verify(observer, times(1)).onComplete();
}
@Test
public void testCreate() {
Observable<String> observable = Observable.just("one", "two", "three");
Subscriber<String> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
verify(observer, times(1)).onNext("one");
verify(observer, times(1)).onNext("two");
verify(observer, times(1)).onNext("three");
verify(observer, never()).onError(any(Throwable.class));
verify(observer, times(1)).onComplete();
}
@Test
public void testDeferFunctionThrows() {
Supplier<Observable<String>> factory = mock(Supplier.class);
when(factory.get()).thenThrow(new TestException());
Observable<String> result = Observable.defer(factory);
Observer<String> o = mock(Observer.class);
result.subscribe(o);
verify(o).onError(any(TestException.class));
verify(o, never()).onNext(any(String.class));
verify(o, never()).onComplete();
}
@Test
public void testJustWithScheduler() {
TestScheduler scheduler = new TestScheduler();
Observable<Integer> observable = Observable.fromArray(1, 2).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(1);
inOrder.verify(observer, times(1)).onNext(2);
inOrder.verify(observer, times(1)).onComplete();
inOrder.verifyNoMoreInteractions();
}
@Ignore // FIXME throwing is not allowed from the create?!
@Test
public void testOnSubscribeFails() {
Subscriber<String> observer = TestHelper.mockSubscriber();
final RuntimeException re = new RuntimeException("bad impl");
Observable<String> o =
Observable.create(
s -> {
throw re;
});
o.subscribe(observer);
verify(observer, times(0)).onNext(anyString());
verify(observer, times(0)).onComplete();
verify(observer, times(1)).onError(re);
}
@Test
public void testHiding() {
PublishSubject<Integer> src = PublishSubject.create();
Observable<Integer> dst = src.asObservable();
assertFalse(dst instanceof PublishSubject);
Subscriber<Object> o = TestHelper.mockSubscriber();
dst.subscribe(o);
src.onNext(1);
src.onComplete();
verify(o).onNext(1);
verify(o).onComplete();
verify(o, never()).onError(any(Throwable.class));
}
@Test
public void testHidingError() {
PublishSubject<Integer> src = PublishSubject.create();
Observable<Integer> dst = src.asObservable();
assertFalse(dst instanceof PublishSubject);
@SuppressWarnings("unchecked")
Observer<Object> o = mock(Observer.class);
dst.subscribe(o);
src.onError(new TestException());
verify(o, never()).onNext(any());
verify(o, never()).onComplete();
verify(o).onError(any(TestException.class));
}
@Test
public void testOfTypeWithPolymorphism() {
ArrayList<Integer> l1 = new ArrayList<>();
l1.add(1);
LinkedList<Integer> l2 = new LinkedList<>();
l2.add(2);
@SuppressWarnings("rawtypes")
Observable<List> observable = Observable.<Object>just(l1, l2, "123").ofType(List.class);
Subscriber<Object> observer = TestHelper.mockSubscriber();
observable.subscribe(observer);
verify(observer, times(1)).onNext(l1);
verify(observer, times(1)).onNext(l2);
verify(observer, never()).onNext("123");
verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
verify(observer, times(1)).onComplete();
}
@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());
}