@Test
public void testZipAsync() {
int NUM = (int) (RxRingBuffer.SIZE * 2.1);
AtomicInteger c1 = new AtomicInteger();
AtomicInteger c2 = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
Observable<Integer> zipped =
Observable.zip(
incrementingIntegers(c1).subscribeOn(Schedulers.computation()),
incrementingIntegers(c2).subscribeOn(Schedulers.computation()),
new Func2<Integer, Integer, Integer>() {
@Override
public Integer call(Integer t1, Integer t2) {
return t1 + t2;
}
});
zipped.take(NUM).subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
System.out.println(
"testZipAsync => Received: "
+ ts.getOnNextEvents().size()
+ " Emitted: "
+ c1.get()
+ " / "
+ c2.get());
assertEquals(NUM, ts.getOnNextEvents().size());
assertTrue(c1.get() < RxRingBuffer.SIZE * 3);
assertTrue(c2.get() < RxRingBuffer.SIZE * 3);
}
@Test
public void testZipAsync() {
int NUM = (int) (Observable.bufferSize() * 2.1);
AtomicInteger c1 = new AtomicInteger();
AtomicInteger c2 = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
Observable<Integer> zipped =
Observable.zip(
incrementingIntegers(c1).subscribeOn(Schedulers.computation()),
incrementingIntegers(c2).subscribeOn(Schedulers.computation()),
(t1, t2) -> t1 + t2);
zipped.take(NUM).subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
System.out.println(
"testZipAsync => Received: "
+ ts.valueCount()
+ " Emitted: "
+ c1.get()
+ " / "
+ c2.get());
assertEquals(NUM, ts.valueCount());
int max = Observable.bufferSize() * 5;
assertTrue("" + c1.get() + " >= " + max, c1.get() < max);
assertTrue("" + c2.get() + " >= " + max, c2.get() < max);
}
/**
* Occasionally zip may be invoked with 0 observables. Test that we don't block indefinitely
* instead of immediately invoking zip with 0 argument.
*
* <p>We now expect an NoSuchElementException since last() requires at least one value and nothing
* will be emitted.
*/
@Test(expected = NoSuchElementException.class)
public void nonBlockingObservable() {
final Object invoked = new Object();
Collection<Observable<Object>> observables = Collections.emptyList();
Observable<Object> result =
Observable.zip(
observables,
args -> {
System.out.println("received: " + args);
assertEquals("No argument should have been passed", 0, args.length);
return invoked;
});
assertSame(invoked, result.toBlocking().last());
}
/** This won't compile if super/extends isn't done correctly on generics */
@Test
public void testCovarianceOfZip() {
Observable<HorrorMovie> horrors = Observable.just(new HorrorMovie());
Observable<CoolRating> ratings = Observable.just(new CoolRating());
Observable.<Movie, CoolRating, Result>zip(horrors, ratings, combine)
.toBlocking()
.forEach(action);
Observable.<Movie, CoolRating, Result>zip(horrors, ratings, combine)
.toBlocking()
.forEach(action);
Observable.<Media, Rating, ExtendedResult>zip(horrors, ratings, combine)
.toBlocking()
.forEach(extendedAction);
Observable.<Media, Rating, Result>zip(horrors, ratings, combine).toBlocking().forEach(action);
Observable.<Media, Rating, ExtendedResult>zip(horrors, ratings, combine)
.toBlocking()
.forEach(action);
Observable.<Movie, CoolRating, Result>zip(horrors, ratings, combine);
}