/**
* Copyright (c) 2016-present, RxJava Contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.reactivex.internal.operators.flowable;
import static org.junit.Assert.*;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.*;
import org.reactivestreams.*;
import io.reactivex.*;
import io.reactivex.exceptions.*;
import io.reactivex.functions.*;
import io.reactivex.internal.functions.Functions;
import io.reactivex.internal.subscriptions.BooleanSubscription;
import io.reactivex.processors.PublishProcessor;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subscribers.TestSubscriber;
public class FlowablePublishFunctionTest {
@Test
public void concatTakeFirstLastCompletes() {
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
Flowable.range(1, 3).publish(new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return Flowable.concat(o.take(5), o.takeLast(5));
}
}).subscribe(ts);
ts.assertValues(1, 2, 3);
ts.assertNoErrors();
ts.assertComplete();
}
@Test
public void concatTakeFirstLastBackpressureCompletes() {
TestSubscriber<Integer> ts = TestSubscriber.create(0L);
Flowable.range(1, 6).publish(new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return Flowable.concat(o.take(5), o.takeLast(5));
}
}).subscribe(ts);
ts.assertNoValues();
ts.assertNoErrors();
ts.assertNotComplete();
ts.request(1); // make sure take() doesn't go unbounded
ts.request(4);
ts.assertValues(1, 2, 3, 4, 5);
ts.assertNoErrors();
ts.assertNotComplete();
ts.request(5);
ts.assertValues(1, 2, 3, 4, 5, 6);
ts.assertNoErrors();
ts.assertComplete();
}
@Test
public void canBeCancelled() {
TestSubscriber<Integer> ts = TestSubscriber.create();
PublishProcessor<Integer> ps = PublishProcessor.create();
ps.publish(new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return Flowable.concat(o.take(5), o.takeLast(5));
}
}).subscribe(ts);
ps.onNext(1);
ps.onNext(2);
ts.assertValues(1, 2);
ts.assertNoErrors();
ts.assertNotComplete();
ts.cancel();
Assert.assertFalse("Source has subscribers?", ps.hasSubscribers());
}
@Test
public void invalidPrefetch() {
try {
Flowable.<Integer>never().publish(
Functions.<Flowable<Integer>>identity(), -99);
fail("Didn't throw IllegalArgumentException");
} catch (IllegalArgumentException ex) {
Assert.assertEquals("prefetch > 0 required but it was -99", ex.getMessage());
}
}
@Test
public void takeCompletes() {
TestSubscriber<Integer> ts = TestSubscriber.create();
PublishProcessor<Integer> ps = PublishProcessor.create();
ps.publish(new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return o.take(1);
}
}).subscribe(ts);
ps.onNext(1);
ts.assertValues(1);
ts.assertNoErrors();
ts.assertComplete();
Assert.assertFalse("Source has subscribers?", ps.hasSubscribers());
}
@Test
public void oneStartOnly() {
final AtomicInteger startCount = new AtomicInteger();
TestSubscriber<Integer> ts = new TestSubscriber<Integer>() {
@Override
public void onStart() {
startCount.incrementAndGet();
}
};
PublishProcessor<Integer> ps = PublishProcessor.create();
ps.publish(new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return o.take(1);
}
}).subscribe(ts);
Assert.assertEquals(1, startCount.get());
}
@Test
public void takeCompletesUnsafe() {
TestSubscriber<Integer> ts = TestSubscriber.create();
PublishProcessor<Integer> ps = PublishProcessor.create();
ps.publish(new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return o.take(1);
}
}).subscribe(ts);
ps.onNext(1);
ts.assertValues(1);
ts.assertNoErrors();
ts.assertComplete();
Assert.assertFalse("Source has subscribers?", ps.hasSubscribers());
}
@Test
public void directCompletesUnsafe() {
TestSubscriber<Integer> ts = TestSubscriber.create();
PublishProcessor<Integer> ps = PublishProcessor.create();
ps.publish(new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return o;
}
}).subscribe(ts);
ps.onNext(1);
ps.onComplete();
ts.assertValues(1);
ts.assertNoErrors();
ts.assertComplete();
Assert.assertFalse("Source has subscribers?", ps.hasSubscribers());
}
@Test
public void overflowMissingBackpressureException() {
TestSubscriber<Integer> ts = TestSubscriber.create(0);
PublishProcessor<Integer> ps = PublishProcessor.create();
ps.publish(new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return o;
}
}).subscribe(ts);
for (int i = 0; i < Flowable.bufferSize() * 2; i++) {
ps.onNext(i);
}
ts.assertNoValues();
ts.assertError(MissingBackpressureException.class);
ts.assertNotComplete();
Assert.assertEquals("Could not emit value due to lack of requests",
ts.errors().get(0).getMessage());
Assert.assertFalse("Source has subscribers?", ps.hasSubscribers());
}
@Test
public void overflowMissingBackpressureExceptionDelayed() {
TestSubscriber<Integer> ts = TestSubscriber.create(0);
PublishProcessor<Integer> ps = PublishProcessor.create();
new FlowablePublishMulticast<Integer, Integer>(ps, new Function<Flowable<Integer>, Flowable<Integer>>() {
@Override
public Flowable<Integer> apply(Flowable<Integer> o) {
return o;
}
}, Flowable.bufferSize(), true).subscribe(ts);
for (int i = 0; i < Flowable.bufferSize() * 2; i++) {
ps.onNext(i);
}
ts.request(Flowable.bufferSize());
ts.assertValueCount(Flowable.bufferSize());
ts.assertError(MissingBackpressureException.class);
ts.assertNotComplete();
Assert.assertEquals("Could not emit value due to lack of requests", ts.errors().get(0).getMessage());
Assert.assertFalse("Source has subscribers?", ps.hasSubscribers());
}
@Test
public void emptyIdentityMapped() {
Flowable.empty()
.publish(Functions.<Flowable<Object>>identity())
.test()
.assertResult()
;
}
@Test
public void independentlyMapped() {
PublishProcessor<Integer> pp = PublishProcessor.create();
TestSubscriber<Integer> ts = pp.publish(new Function<Flowable<Integer>, Publisher<Integer>>() {
@Override
public Publisher<Integer> apply(Flowable<Integer> v) throws Exception {
return Flowable.range(1, 5);
}
}).test(0);
assertTrue("pp has no Subscribers?!", pp.hasSubscribers());
ts.assertNoValues()
.assertNoErrors()
.assertNotComplete();
ts.request(5);
ts.assertResult(1, 2, 3, 4, 5);
assertFalse("pp has Subscribers?!", pp.hasSubscribers());
}
@Test
public void badSource() {
TestHelper.checkBadSourceFlowable(new Function<Flowable<Integer>, Object>() {
@Override
public Object apply(Flowable<Integer> f) throws Exception {
return f.publish(Functions.<Flowable<Integer>>identity());
}
}, false, 1, 1, 1);
}
@Test
public void frontOverflow() {
new Flowable<Integer>() {
@Override
protected void subscribeActual(Subscriber<? super Integer> s) {
s.onSubscribe(new BooleanSubscription());
for (int i = 0; i < 9; i++) {
s.onNext(i);
}
}
}
.publish(Functions.<Flowable<Integer>>identity(), 8)
.test(0)
.assertFailure(MissingBackpressureException.class);
}
@Test
public void errorResubscribe() {
Flowable.error(new TestException())
.publish(new Function<Flowable<Object>, Publisher<Object>>() {
@Override
public Publisher<Object> apply(Flowable<Object> f) throws Exception {
return f.onErrorResumeNext(f);
}
})
.test()
.assertFailure(TestException.class);
}
@Test
public void fusedInputCrash() {
Flowable.just(1)
.map(new Function<Integer, Integer>() {
@Override
public Integer apply(Integer v) throws Exception {
throw new TestException();
}
})
.publish(Functions.<Flowable<Integer>>identity())
.test()
.assertFailure(TestException.class);
}
@Test
public void error() {
new FlowablePublishMulticast<Integer, Integer>(Flowable.just(1).concatWith(Flowable.<Integer>error(new TestException())),
Functions.<Flowable<Integer>>identity(), 16, true)
.test()
.assertFailure(TestException.class, 1);
}
@Test
public void backpressuredEmpty() {
Flowable.<Integer>empty()
.publish(Functions.<Flowable<Integer>>identity())
.test(0L)
.assertResult();
}
@Test
public void oneByOne() {
Flowable.range(1, 10)
.publish(Functions.<Flowable<Integer>>identity())
.rebatchRequests(1)
.test()
.assertResult(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
}
@Test
public void completeCancelRaceNoRequest() {
final PublishProcessor<Integer> pp = PublishProcessor.create();
final TestSubscriber<Integer> ts = new TestSubscriber<Integer>(1L) {
@Override
public void onNext(Integer t) {
super.onNext(t);
if (t == 1) {
cancel();
onComplete();
}
}
};
pp.publish(Functions.<Flowable<Integer>>identity()).subscribe(ts);
pp.onNext(1);
assertFalse(pp.hasSubscribers());
ts.assertResult(1);
}
@Test
public void inputOutputSubscribeRace() {
Flowable<Integer> source = Flowable.just(1)
.publish(new Function<Flowable<Integer>, Publisher<Integer>>() {
@Override
public Publisher<Integer> apply(Flowable<Integer> f) throws Exception {
return f.subscribeOn(Schedulers.single());
}
});
for (int i = 0; i < 500; i++) {
source.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertResult(1);
}
}
@Test
public void inputOutputSubscribeRace2() {
Flowable<Integer> source = Flowable.just(1).subscribeOn(Schedulers.single())
.publish(Functions.<Flowable<Integer>>identity());
for (int i = 0; i < 500; i++) {
source.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertResult(1);
}
}
@Test
public void sourceSubscriptionDelayed() {
for (int i = 0; i < 500; i++) {
final TestSubscriber<Integer> ts1 = new TestSubscriber<Integer>(0L);
Flowable.just(1)
.publish(new Function<Flowable<Integer>, Publisher<Integer>>() {
@Override
public Publisher<Integer> apply(final Flowable<Integer> f) throws Exception {
Runnable r1 = new Runnable() {
@Override
public void run() {
f.subscribe(ts1);
}
};
Runnable r2 = new Runnable() {
@Override
public void run() {
for (int j = 0; j < 100; j++) {
ts1.request(1);
}
}
};
TestHelper.race(r1, r2);
return f;
}
}).test()
.assertResult(1);
ts1.assertResult(1);
}
}
@Test
public void longFlow() {
Flowable.range(1, 1000000)
.publish(new Function<Flowable<Integer>, Publisher<Integer>>() {
@SuppressWarnings("unchecked")
@Override
public Publisher<Integer> apply(Flowable<Integer> v) throws Exception {
return Flowable.mergeArray(
v.filter(new Predicate<Integer>() {
@Override
public boolean test(Integer w) throws Exception {
return w % 2 == 0;
}
}),
v.filter(new Predicate<Integer>() {
@Override
public boolean test(Integer w) throws Exception {
return w % 2 != 0;
}
}));
}
})
.takeLast(1)
.test()
.assertResult(1000000);
}
@Test
public void longFlow2() {
Flowable.range(1, 100000)
.publish(new Function<Flowable<Integer>, Publisher<Integer>>() {
@SuppressWarnings("unchecked")
@Override
public Publisher<Integer> apply(Flowable<Integer> v) throws Exception {
return Flowable.mergeArray(
v.filter(new Predicate<Integer>() {
@Override
public boolean test(Integer w) throws Exception {
return w % 2 == 0;
}
}),
v.filter(new Predicate<Integer>() {
@Override
public boolean test(Integer w) throws Exception {
return w % 2 != 0;
}
}));
}
})
.test()
.assertValueCount(100000)
.assertNoErrors()
.assertComplete();
}
@Test
public void longFlowHidden() {
Flowable.range(1, 1000000).hide()
.publish(new Function<Flowable<Integer>, Publisher<Integer>>() {
@SuppressWarnings("unchecked")
@Override
public Publisher<Integer> apply(Flowable<Integer> v) throws Exception {
return Flowable.mergeArray(
v.filter(new Predicate<Integer>() {
@Override
public boolean test(Integer w) throws Exception {
return w % 2 == 0;
}
}),
v.filter(new Predicate<Integer>() {
@Override
public boolean test(Integer w) throws Exception {
return w % 2 != 0;
}
}));
}
})
.takeLast(1)
.test()
.assertResult(1000000);
}
}