@Test
public void shouldNotEmitUntilAfterSubscription() {
TestSubscriber<Integer> ts = new TestSubscriber<>();
Observable.range(1, 100)
.scan(
0,
new BiFunction<Integer, Integer, Integer>() {
@Override
public Integer apply(Integer t1, Integer t2) {
return t1 + t2;
}
})
.filter(
new Predicate<Integer>() {
@Override
public boolean test(Integer t1) {
// this will cause request(1) when 0 is emitted
return t1 > 0;
}
})
.subscribe(ts);
assertEquals(100, ts.values().size());
}
@Test
public void testDelayErrorMaxConcurrent() {
final List<Long> requests = new ArrayList<>();
Observable<Integer> source =
Observable.mergeDelayError(
Observable.just(
Observable.just(1).asObservable(),
Observable.<Integer>error(new TestException()))
.doOnRequest(
new LongConsumer() {
@Override
public void accept(long t1) {
requests.add(t1);
}
}),
1);
TestSubscriber<Integer> ts = new TestSubscriber<>();
source.subscribe(ts);
ts.assertValue(1);
ts.assertTerminated();
ts.assertError(TestException.class);
assertEquals(Arrays.asList(1L, 1L, 1L), requests);
}
@Test
public void testErrorInParentObservableDelayed() throws Exception {
for (int i = 0; i < 50; i++) {
final TestASynchronous1sDelayedObservable o1 = new TestASynchronous1sDelayedObservable();
final TestASynchronous1sDelayedObservable o2 = new TestASynchronous1sDelayedObservable();
Observable<Observable<String>> parentObservable =
Observable.create(
new Publisher<Observable<String>>() {
@Override
public void subscribe(Subscriber<? super Observable<String>> op) {
op.onSubscribe(EmptySubscription.INSTANCE);
op.onNext(Observable.create(o1));
op.onNext(Observable.create(o2));
op.onError(new NullPointerException("throwing exception in parent"));
}
});
Subscriber<String> stringObserver = TestHelper.mockSubscriber();
TestSubscriber<String> ts = new TestSubscriber<>(stringObserver);
Observable<String> m = Observable.mergeDelayError(parentObservable);
m.subscribe(ts);
System.out.println("testErrorInParentObservableDelayed | " + i);
ts.awaitTerminalEvent(2000, TimeUnit.MILLISECONDS);
ts.assertTerminated();
verify(stringObserver, times(2)).onNext("hello");
verify(stringObserver, times(1)).onError(any(NullPointerException.class));
verify(stringObserver, never()).onComplete();
}
}
@Test
public void testErrorInParentObservable() {
TestSubscriber<Integer> ts = new TestSubscriber<>();
Observable.mergeDelayError(
Observable.just(Observable.just(1), Observable.just(2))
.startWith(Observable.<Integer>error(new RuntimeException())))
.subscribe(ts);
ts.awaitTerminalEvent();
ts.assertTerminated();
ts.assertValues(1, 2);
assertEquals(1, ts.errorCount());
}
/** Should request -1 for infinite */
@Test
public void testRequestFromFinalSubscribeWithoutRequestValue() {
TestSubscriber<String> s = new TestSubscriber<>();
final AtomicLong r = new AtomicLong();
s.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
r.set(n);
}
@Override
public void cancel() {}
});
assertEquals(Long.MAX_VALUE, r.get());
}
@Test
public void testScanWithRequestOne() {
Observable<Integer> o =
Observable.just(1, 2)
.scan(
0,
new BiFunction<Integer, Integer, Integer>() {
@Override
public Integer apply(Integer t1, Integer t2) {
return t1 + t2;
}
})
.take(1);
TestSubscriber<Integer> subscriber = new TestSubscriber<>();
o.subscribe(subscriber);
subscriber.assertValue(0);
subscriber.assertTerminated();
subscriber.assertNoErrors();
}
@Test
public void testRequestFromChainedOperator() {
TestSubscriber<String> s = new TestSubscriber<>();
Operator<String, String> o =
s1 ->
new Subscriber<String>() {
@Override
public void onSubscribe(Subscription a) {
s1.onSubscribe(a);
}
@Override
public void onComplete() {}
@Override
public void onError(Throwable e) {}
@Override
public void onNext(String t) {}
};
s.request(10);
Subscriber<? super String> ns = o.apply(s);
final AtomicLong r = new AtomicLong();
// set set the producer at the top of the chain (ns) and it should flow through the operator to
// the (s) subscriber
// and then it should request up with the value set on the final Subscriber (s)
ns.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
r.set(n);
}
@Override
public void cancel() {}
});
assertEquals(10, r.get());
}
@Test
public void testInitialValueEmittedWithProducer() {
Observable<Integer> source = Observable.never();
TestSubscriber<Integer> ts = new TestSubscriber<>();
source
.scan(
0,
new BiFunction<Integer, Integer, Integer>() {
@Override
public Integer apply(Integer t1, Integer t2) {
return t1 + t2;
}
})
.subscribe(ts);
ts.assertNoErrors();
ts.assertNotComplete();
ts.assertValue(0);
}
@Test
public void testRequestToObservable() {
TestSubscriber<Integer> ts = new TestSubscriber<>();
ts.request(3);
final AtomicLong requested = new AtomicLong();
Observable.<Integer>create(
s ->
s.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
requested.set(n);
}
@Override
public void cancel() {}
}))
.subscribe(ts);
assertEquals(3, requested.get());
}
@Test
public void testRequestThroughTakeWhereRequestIsSmallerThanTake() {
TestSubscriber<Integer> ts = new TestSubscriber<>((Long) null);
ts.request(3);
final AtomicLong requested = new AtomicLong();
Observable.<Integer>create(
s ->
s.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
requested.set(n);
}
@Override
public void cancel() {}
}))
.take(10)
.subscribe(ts);
assertEquals(3, requested.get());
}
@Test
public void testRequestThroughTakeThatReducesRequest() {
TestSubscriber<Integer> ts = new TestSubscriber<>((Long) null);
ts.request(3);
final AtomicLong requested = new AtomicLong();
Observable.<Integer>create(
s ->
s.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
requested.set(n);
}
@Override
public void cancel() {}
}))
.take(2)
.subscribe(ts);
// FIXME the take now requests Long.MAX_PATH if downstream requests at least the limit
assertEquals(Long.MAX_VALUE, requested.get());
}
@Test
public void testRequestFromDecoupledOperatorThatRequestsN() {
TestSubscriber<String> s = new TestSubscriber<>();
final AtomicLong innerR = new AtomicLong();
Operator<String, String> o =
child -> {
// we want to decouple the chain so set our own Producer on the child instead of it coming
// from the parent
child.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
innerR.set(n);
}
@Override
public void cancel() {}
});
AsyncObserver<String> as =
new AsyncObserver<String>() {
@Override
protected void onStart() {
// we request 99 up to the parent
request(99);
}
@Override
public void onComplete() {}
@Override
public void onError(Throwable e) {}
@Override
public void onNext(String t) {}
};
return as;
};
s.request(10);
Subscriber<? super String> ns = o.apply(s);
final AtomicLong r = new AtomicLong();
// set set the producer at the top of the chain (ns) and it should flow through the operator to
// the (s) subscriber
// and then it should request up with the value set on the final Subscriber (s)
ns.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
r.set(n);
}
@Override
public void cancel() {}
});
assertEquals(99, r.get());
assertEquals(10, innerR.get());
}