@Test
public void testAwaitTerminalEventWithDuration() {
TestSubscriber<Object> ts = new TestSubscriber<Object>();
Observable.just(1).subscribe(ts);
ts.awaitTerminalEvent(1, TimeUnit.SECONDS);
ts.assertTerminalEvent();
}
@Test(timeout = 2000)
public void testFirehoseFailsAsExpected() {
AtomicInteger c = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
firehose(c)
.observeOn(Schedulers.computation())
.map(
v -> {
try {
Thread.sleep(10);
} catch (Exception e) {
e.printStackTrace();
}
return v;
})
.subscribe(ts);
ts.awaitTerminalEvent();
System.out.println(
"testFirehoseFailsAsExpected => Received: " + ts.valueCount() + " Emitted: " + c.get());
// FIXME it is possible slow is not slow enough or the main gets delayed and thus more than one
// source value is emitted.
int vc = ts.valueCount();
assertTrue("10 < " + vc, vc <= 10);
ts.assertError(MissingBackpressureException.class);
}
@Test
public void testObserveOnWithSlowConsumer() {
int NUM = (int) (Observable.bufferSize() * 0.2);
AtomicInteger c = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
incrementingIntegers(c)
.observeOn(Schedulers.computation())
.map(
i -> {
try {
Thread.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}
return i;
})
.take(NUM)
.subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
System.out.println(
"testObserveOnWithSlowConsumer => Received: " + ts.valueCount() + " Emitted: " + c.get());
assertEquals(NUM, ts.valueCount());
assertTrue(c.get() < Observable.bufferSize() * 2);
}
@Test(timeout = 10000)
public void testOnBackpressureDropSynchronous() {
for (int i = 0; i < 100; i++) {
int NUM =
(int) (Observable.bufferSize() * 1.1); // > 1 so that take doesn't prevent buffer overflow
AtomicInteger c = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
firehose(c).onBackpressureDrop().map(SLOW_PASS_THRU).take(NUM).subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
List<Integer> onNextEvents = ts.values();
assertEquals(NUM, onNextEvents.size());
Integer lastEvent = onNextEvents.get(NUM - 1);
System.out.println(
"testOnBackpressureDrop => Received: "
+ onNextEvents.size()
+ " Emitted: "
+ c.get()
+ " Last value: "
+ lastEvent);
// it drop, so we should get some number far higher than what would have sequentially
// incremented
assertTrue(NUM - 1 <= lastEvent.intValue());
}
}
@Test
public void testInterruptTerminalEventAwaitTimed() {
TestSubscriber<Integer> ts = TestSubscriber.create();
final Thread t0 = Thread.currentThread();
Worker w = Schedulers.computation().createWorker();
try {
w.schedule(
new Action0() {
@Override
public void call() {
t0.interrupt();
}
},
200,
TimeUnit.MILLISECONDS);
try {
ts.awaitTerminalEvent(5, TimeUnit.SECONDS);
fail("Did not interrupt wait!");
} catch (RuntimeException ex) {
if (!(ex.getCause() instanceof InterruptedException)) {
fail("The cause is not InterruptedException! " + ex.getCause());
}
}
} finally {
w.unsubscribe();
}
}
@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);
}
@Test
public void testAssertError() {
RuntimeException e = new RuntimeException("Oops");
TestSubscriber<Object> subscriber = new TestSubscriber<Object>();
Observable.error(e).subscribe(subscriber);
subscriber.assertError(e);
}
@Test
public void testTakeFilterSkipChainAsync() {
int NUM = (int) (Observable.bufferSize() * 2.1);
AtomicInteger c = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
incrementingIntegers(c)
.observeOn(Schedulers.computation())
.skip(10000)
.filter(i -> i > 11000)
.take(NUM)
.subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
// emit 10000 that are skipped
// emit next 1000 that are filtered out
// take NUM
// so emitted is at least 10000+1000+NUM + extra for buffer size/threshold
int expected = 10000 + 1000 + Observable.bufferSize() * 3 + Observable.bufferSize() / 2;
System.out.println(
"testTakeFilterSkipChain => Received: "
+ ts.valueCount()
+ " Emitted: "
+ c.get()
+ " Expected: "
+ expected);
assertEquals(NUM, ts.valueCount());
assertTrue(c.get() < expected);
}
@Test
public void testMergeAsync() {
int NUM = (int) (Observable.bufferSize() * 4.1);
AtomicInteger c1 = new AtomicInteger();
AtomicInteger c2 = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
Observable<Integer> merged =
Observable.merge(
incrementingIntegers(c1).subscribeOn(Schedulers.computation()),
incrementingIntegers(c2).subscribeOn(Schedulers.computation()));
merged.take(NUM).subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
System.out.println(
"testMergeAsync => Received: "
+ ts.valueCount()
+ " Emitted: "
+ c1.get()
+ " / "
+ c2.get());
assertEquals(NUM, ts.valueCount());
// either one can starve the other, but neither should be capable of doing more than 5 batches
// (taking 4.1)
// TODO is it possible to make this deterministic rather than one possibly starving the other?
// benjchristensen => In general I'd say it's not worth trying to make it so, as "fair"
// algoritms generally take a performance hit
int max = Observable.bufferSize() * 7;
assertTrue("" + c1.get() + " >= " + max, c1.get() < max);
assertTrue("" + c2.get() + " >= " + max, c2.get() < max);
}
@Test
public void testMergeAsyncThenObserveOn() {
int NUM = (int) (Observable.bufferSize() * 4.1);
AtomicInteger c1 = new AtomicInteger();
AtomicInteger c2 = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
Observable<Integer> merged =
Observable.merge(
incrementingIntegers(c1).subscribeOn(Schedulers.computation()),
incrementingIntegers(c2).subscribeOn(Schedulers.computation()));
merged.observeOn(Schedulers.newThread()).take(NUM).subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
System.out.println(
"testMergeAsyncThenObserveOn => Received: "
+ ts.valueCount()
+ " Emitted: "
+ c1.get()
+ " / "
+ c2.get());
assertEquals(NUM, ts.valueCount());
// either one can starve the other, but neither should be capable of doing more than 5 batches
// (taking 4.1)
// TODO is it possible to make this deterministic rather than one possibly starving the other?
// benjchristensen => In general I'd say it's not worth trying to make it so, as "fair"
// algoritms generally take a performance hit
// akarnokd => run this in a loop over 10k times and never saw values get as high as 7*SIZE, but
// since observeOn delays the unsubscription non-deterministically, the test will remain
// unreliable
assertTrue(c1.get() < Observable.bufferSize() * 7);
assertTrue(c2.get() < Observable.bufferSize() * 7);
}
@Test
@Ignore // the test is non-deterministic and can't be made deterministic
public void testFlatMapAsync() {
int NUM = (int) (Observable.bufferSize() * 2.1);
AtomicInteger c = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
incrementingIntegers(c)
.subscribeOn(Schedulers.computation())
.flatMap(
i ->
incrementingIntegers(new AtomicInteger())
.take(10)
.subscribeOn(Schedulers.computation()))
.take(NUM)
.subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
System.out.println(
"testFlatMapAsync => Received: "
+ ts.valueCount()
+ " Emitted: "
+ c.get()
+ " Size: "
+ Observable.bufferSize());
assertEquals(NUM, ts.valueCount());
// even though we only need 10, it will request at least Observable.bufferSize(), and then as it
// drains keep requesting more
// and then it will be non-deterministic when the take() causes the unsubscribe as it is
// scheduled on 10 different schedulers (threads)
// normally this number is ~250 but can get up to ~1200 when Observable.bufferSize() == 1024
assertTrue(c.get() <= Observable.bufferSize() * 2);
}
@Test
public void testInterruptTerminalEventAwaitAndUnsubscribe() {
TestSubscriber<Integer> ts = TestSubscriber.create();
final Thread t0 = Thread.currentThread();
Worker w = Schedulers.computation().createWorker();
try {
w.schedule(
new Action0() {
@Override
public void call() {
t0.interrupt();
}
},
200,
TimeUnit.MILLISECONDS);
ts.awaitTerminalEventAndUnsubscribeOnTimeout(5, TimeUnit.SECONDS);
if (!ts.isUnsubscribed()) {
fail("Did not unsubscribe!");
}
} finally {
w.unsubscribe();
}
}
@Test
public void testDelegate1() {
TestObserver<Integer> to = new TestObserver<Integer>();
TestSubscriber<Integer> ts = TestSubscriber.create(to);
ts.onCompleted();
to.assertTerminalEvent();
}
@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 testNotCompleted() {
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
try {
ts.assertCompleted();
} catch (AssertionError ex) {
// expected
return;
}
fail("Not completed and no assertion error!");
}
@Test
public void testUnsubscribed() {
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
try {
ts.assertUnsubscribed();
} catch (AssertionError ex) {
// expected
return;
}
fail("Not unsubscribed but not reported!");
}
@Test
public void testNoError2() {
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
try {
ts.assertError(new TestException());
} catch (AssertionError ex) {
// expected
return;
}
fail("No present but no assertion error!");
}
@Test
public void testObserveOn() {
int NUM = (int) (Observable.bufferSize() * 2.1);
AtomicInteger c = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
incrementingIntegers(c).observeOn(Schedulers.computation()).take(NUM).subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
System.out.println("testObserveOn => Received: " + ts.valueCount() + " Emitted: " + c.get());
assertEquals(NUM, ts.valueCount());
assertTrue(c.get() < Observable.bufferSize() * 4);
}
@Test
public void testDifferentError3() {
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
ts.onError(new RuntimeException());
try {
ts.assertError(TestException.class);
} catch (AssertionError ex) {
// expected
return;
}
fail("Different Error present but no assertion error!");
}
@Test
public void testNoValues() {
TestSubscriber<Integer> ts = TestSubscriber.create();
ts.onNext(1);
try {
ts.assertNoValues();
fail("Failed to report there were values!");
} catch (AssertionError ex) {
// expected
}
}
@Test
public void testMultipleCompletions2() {
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
ts.onCompleted();
ts.onCompleted();
try {
ts.assertNotCompleted();
} catch (AssertionError ex) {
// expected
return;
}
fail("Multiple completions and no assertion error!");
}
@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 testNoTerminalEventBut1Error() {
TestSubscriber<Integer> ts = TestSubscriber.create();
ts.onError(new TestException());
try {
ts.assertNoTerminalEvent();
fail("Failed to report there were terminal event(s)!");
} catch (AssertionError ex) {
// expected
}
}
@Test
public void testMultipleErrors3() {
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
ts.onError(new TestException());
ts.onError(new TestException());
try {
ts.assertError(new TestException());
} catch (AssertionError ex) {
if (!(ex.getCause() instanceof CompositeException)) {
fail("Multiple Error present but the reported error doesn't have a composite cause!");
}
// expected
return;
}
fail("Multiple Error present but no assertion error!");
}
@Test
public void testAssertTerminalEventNotReceived() {
PublishSubject<Integer> p = PublishSubject.create();
TestSubscriber<Integer> o = new TestSubscriber<Integer>();
p.subscribe(o);
p.onNext(1);
p.onNext(2);
thrown.expect(AssertionError.class);
thrown.expectMessage("No terminal events received.");
o.assertReceivedOnNext(Arrays.asList(1, 2));
assertEquals(2, o.getOnNextEvents().size());
o.assertTerminalEvent();
}
@Test
public void testNoTerminalEventBut2Errors() {
TestSubscriber<Integer> ts = TestSubscriber.create();
ts.onError(new TestException());
ts.onError(new TestException());
try {
ts.assertNoTerminalEvent();
fail("Failed to report there were terminal event(s)!");
} catch (AssertionError ex) {
// expected
if (!(ex.getCause() instanceof CompositeException)) {
fail("Did not report a composite exception cause: " + ex.getCause());
}
}
}
/** 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(timeout = 20000)
public void testOnBackpressureDropWithAction() {
for (int i = 0; i < 100; i++) {
final AtomicInteger emitCount = new AtomicInteger();
final AtomicInteger dropCount = new AtomicInteger();
final AtomicInteger passCount = new AtomicInteger();
final int NUM =
Observable.bufferSize() * 3; // > 1 so that take doesn't prevent buffer overflow
TestSubscriber<Integer> ts = new TestSubscriber<>();
firehose(emitCount)
.onBackpressureDrop(v -> dropCount.incrementAndGet())
.doOnNext(v -> passCount.incrementAndGet())
.observeOn(Schedulers.computation())
.map(SLOW_PASS_THRU)
.take(NUM)
.subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
List<Integer> onNextEvents = ts.values();
Integer lastEvent = onNextEvents.get(NUM - 1);
System.out.println(
testName.getMethodName()
+ " => Received: "
+ onNextEvents.size()
+ " Passed: "
+ passCount.get()
+ " Dropped: "
+ dropCount.get()
+ " Emitted: "
+ emitCount.get()
+ " Last value: "
+ lastEvent);
assertEquals(NUM, onNextEvents.size());
// in reality, NUM < passCount
assertTrue(NUM <= passCount.get());
// it drop, so we should get some number far higher than what would have sequentially
// incremented
assertTrue(NUM - 1 <= lastEvent.intValue());
assertTrue(0 < dropCount.get());
assertEquals(emitCount.get(), passCount.get() + dropCount.get());
}
}
@Test
public void testFlatMapSync() {
int NUM = (int) (Observable.bufferSize() * 2.1);
AtomicInteger c = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<>();
incrementingIntegers(c)
.flatMap(i -> incrementingIntegers(new AtomicInteger()).take(10))
.take(NUM)
.subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
System.out.println("testFlatMapSync => Received: " + ts.valueCount() + " Emitted: " + c.get());
assertEquals(NUM, ts.valueCount());
// expect less than 1 buffer since the flatMap is emitting 10 each time, so it is NUM/10 that
// will be taken.
assertTrue(c.get() < Observable.bufferSize());
}