/**
* 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.List;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicReference;
import io.reactivex.annotations.NonNull;
import org.junit.Test;
import org.reactivestreams.*;
import io.reactivex.*;
import io.reactivex.exceptions.TestException;
import io.reactivex.functions.Action;
import io.reactivex.internal.subscriptions.BooleanSubscription;
import io.reactivex.plugins.RxJavaPlugins;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subscribers.TestSubscriber;
public class FlowableUnsubscribeOnTest {
@Test(timeout = 5000)
public void unsubscribeWhenSubscribeOnAndUnsubscribeOnAreOnSameThread() throws InterruptedException {
UIEventLoopScheduler UI_EVENT_LOOP = new UIEventLoopScheduler();
try {
final ThreadSubscription subscription = new ThreadSubscription();
final AtomicReference<Thread> subscribeThread = new AtomicReference<Thread>();
Flowable<Integer> w = Flowable.unsafeCreate(new Publisher<Integer>() {
@Override
public void subscribe(Subscriber<? super Integer> t1) {
subscribeThread.set(Thread.currentThread());
t1.onSubscribe(subscription);
t1.onNext(1);
t1.onNext(2);
t1.onComplete();
}
});
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
w.subscribeOn(UI_EVENT_LOOP).observeOn(Schedulers.computation())
.unsubscribeOn(UI_EVENT_LOOP)
.take(2)
.subscribe(ts);
ts.awaitTerminalEvent(1, TimeUnit.SECONDS);
Thread unsubscribeThread = subscription.getThread();
assertNotNull(unsubscribeThread);
assertNotSame(Thread.currentThread(), unsubscribeThread);
assertNotNull(subscribeThread.get());
assertNotSame(Thread.currentThread(), subscribeThread.get());
// True for Schedulers.newThread()
System.out.println("unsubscribeThread: " + unsubscribeThread);
System.out.println("subscribeThread.get(): " + subscribeThread.get());
assertTrue(unsubscribeThread == UI_EVENT_LOOP.getThread());
ts.assertValues(1, 2);
ts.assertTerminated();
} finally {
UI_EVENT_LOOP.shutdown();
}
}
@Test(timeout = 5000)
public void unsubscribeWhenSubscribeOnAndUnsubscribeOnAreOnDifferentThreads() throws InterruptedException {
UIEventLoopScheduler UI_EVENT_LOOP = new UIEventLoopScheduler();
try {
final ThreadSubscription subscription = new ThreadSubscription();
final AtomicReference<Thread> subscribeThread = new AtomicReference<Thread>();
Flowable<Integer> w = Flowable.unsafeCreate(new Publisher<Integer>() {
@Override
public void subscribe(Subscriber<? super Integer> t1) {
subscribeThread.set(Thread.currentThread());
t1.onSubscribe(subscription);
t1.onNext(1);
t1.onNext(2);
t1.onComplete();
}
});
TestSubscriber<Integer> observer = new TestSubscriber<Integer>();
w.subscribeOn(Schedulers.newThread()).observeOn(Schedulers.computation())
.unsubscribeOn(UI_EVENT_LOOP)
.take(2)
.subscribe(observer);
observer.awaitTerminalEvent(1, TimeUnit.SECONDS);
Thread unsubscribeThread = subscription.getThread();
assertNotNull(unsubscribeThread);
assertNotSame(Thread.currentThread(), unsubscribeThread);
assertNotNull(subscribeThread.get());
assertNotSame(Thread.currentThread(), subscribeThread.get());
// True for Schedulers.newThread()
System.out.println("UI Thread: " + UI_EVENT_LOOP.getThread());
System.out.println("unsubscribeThread: " + unsubscribeThread);
System.out.println("subscribeThread.get(): " + subscribeThread.get());
assertSame(unsubscribeThread, UI_EVENT_LOOP.getThread());
observer.assertValues(1, 2);
observer.assertTerminated();
} finally {
UI_EVENT_LOOP.shutdown();
}
}
private static class ThreadSubscription implements Subscription {
private volatile Thread thread;
private final CountDownLatch latch = new CountDownLatch(1);
@Override
public void cancel() {
System.out.println("unsubscribe invoked: " + Thread.currentThread());
thread = Thread.currentThread();
latch.countDown();
}
public Thread getThread() throws InterruptedException {
latch.await();
return thread;
}
@Override
public void request(long n) {
}
}
public static class UIEventLoopScheduler extends Scheduler {
private final Scheduler eventLoop;
private volatile Thread t;
public UIEventLoopScheduler() {
eventLoop = Schedulers.single();
/*
* DON'T DO THIS IN PRODUCTION CODE
*/
final CountDownLatch latch = new CountDownLatch(1);
eventLoop.scheduleDirect(new Runnable() {
@Override
public void run() {
t = Thread.currentThread();
latch.countDown();
}
});
try {
latch.await();
} catch (InterruptedException e) {
throw new RuntimeException("failed to initialize and get inner thread");
}
}
@NonNull
@Override
public Worker createWorker() {
return eventLoop.createWorker();
}
public Thread getThread() {
return t;
}
}
@Test
public void takeHalf() {
int elements = 1024;
Flowable.range(0, elements * 2).unsubscribeOn(Schedulers.single())
.take(elements)
.test()
.awaitDone(5, TimeUnit.SECONDS)
.assertValueCount(elements)
.assertComplete()
.assertNoErrors()
.assertSubscribed();
}
@Test
public void dispose() {
TestHelper.checkDisposed(Flowable.just(1).unsubscribeOn(Schedulers.single()));
}
@Test
public void normal() {
final int[] calls = { 0 };
Flowable.just(1)
.doOnCancel(new Action() {
@Override
public void run() throws Exception {
calls[0]++;
}
})
.unsubscribeOn(Schedulers.single())
.test()
.assertResult(1);
assertEquals(0, calls[0]);
}
@Test
public void error() {
final int[] calls = { 0 };
Flowable.error(new TestException())
.doOnCancel(new Action() {
@Override
public void run() throws Exception {
calls[0]++;
}
})
.unsubscribeOn(Schedulers.single())
.test()
.assertFailure(TestException.class);
assertEquals(0, calls[0]);
}
@Test
public void signalAfterDispose() {
List<Throwable> errors = TestHelper.trackPluginErrors();
try {
new Flowable<Integer>() {
@Override
protected void subscribeActual(Subscriber<? super Integer> observer) {
observer.onSubscribe(new BooleanSubscription());
observer.onNext(1);
observer.onNext(2);
observer.onError(new TestException());
observer.onComplete();
}
}
.unsubscribeOn(Schedulers.single())
.take(1)
.test()
.assertResult(1);
TestHelper.assertUndeliverable(errors, 0, TestException.class);
} finally {
RxJavaPlugins.reset();
}
}
}