/** Should request n for whatever the final Subscriber asks for */
@Test
public void testRequestFromFinalSubscribeWithRequestValue() {
TestSubscriber<String> s = new TestSubscriber<>((Long) null);
s.request(10);
final AtomicLong r = new AtomicLong();
s.onSubscribe(
new Subscription() {
@Override
public void request(long n) {
r.set(n);
}
@Override
public void cancel() {}
});
assertEquals(10, r.get());
}
@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 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());
}