/**
* 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.observable;
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.*;
import io.reactivex.*;
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.disposables.Disposables;
import io.reactivex.exceptions.TestException;
import io.reactivex.functions.*;
import io.reactivex.observers.TestObserver;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subjects.PublishSubject;
public class ObservableCacheTest {
@Test
public void testColdReplayNoBackpressure() {
ObservableCache<Integer> source = (ObservableCache<Integer>)ObservableCache.from(Observable.range(0, 1000));
assertFalse("Source is connected!", source.isConnected());
TestObserver<Integer> ts = new TestObserver<Integer>();
source.subscribe(ts);
assertTrue("Source is not connected!", source.isConnected());
assertFalse("Subscribers retained!", source.hasObservers());
ts.assertNoErrors();
ts.assertTerminated();
List<Integer> onNextEvents = ts.values();
assertEquals(1000, onNextEvents.size());
for (int i = 0; i < 1000; i++) {
assertEquals((Integer)i, onNextEvents.get(i));
}
}
@Test
public void testCache() throws InterruptedException {
final AtomicInteger counter = new AtomicInteger();
Observable<String> o = Observable.unsafeCreate(new ObservableSource<String>() {
@Override
public void subscribe(final Observer<? super String> observer) {
observer.onSubscribe(Disposables.empty());
new Thread(new Runnable() {
@Override
public void run() {
counter.incrementAndGet();
System.out.println("published Observable being executed");
observer.onNext("one");
observer.onComplete();
}
}).start();
}
}).cache();
// we then expect the following 2 subscriptions to get that same value
final CountDownLatch latch = new CountDownLatch(2);
// subscribe once
o.subscribe(new Consumer<String>() {
@Override
public void accept(String v) {
assertEquals("one", v);
System.out.println("v: " + v);
latch.countDown();
}
});
// subscribe again
o.subscribe(new Consumer<String>() {
@Override
public void accept(String v) {
assertEquals("one", v);
System.out.println("v: " + v);
latch.countDown();
}
});
if (!latch.await(1000, TimeUnit.MILLISECONDS)) {
fail("subscriptions did not receive values");
}
assertEquals(1, counter.get());
}
@Test
public void testUnsubscribeSource() throws Exception {
Action unsubscribe = mock(Action.class);
Observable<Integer> o = Observable.just(1).doOnDispose(unsubscribe).cache();
o.subscribe();
o.subscribe();
o.subscribe();
verify(unsubscribe, times(1)).run();
}
@Test
public void testTake() {
TestObserver<Integer> ts = new TestObserver<Integer>();
ObservableCache<Integer> cached = (ObservableCache<Integer>)ObservableCache.from(Observable.range(1, 100));
cached.take(10).subscribe(ts);
ts.assertNoErrors();
ts.assertComplete();
ts.assertValues(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
// ts.assertUnsubscribed(); // FIXME no longer valid
assertFalse(cached.hasObservers());
}
@Test
public void testAsync() {
Observable<Integer> source = Observable.range(1, 10000);
for (int i = 0; i < 100; i++) {
TestObserver<Integer> ts1 = new TestObserver<Integer>();
ObservableCache<Integer> cached = (ObservableCache<Integer>)ObservableCache.from(source);
cached.observeOn(Schedulers.computation()).subscribe(ts1);
ts1.awaitTerminalEvent(2, TimeUnit.SECONDS);
ts1.assertNoErrors();
ts1.assertComplete();
assertEquals(10000, ts1.values().size());
TestObserver<Integer> ts2 = new TestObserver<Integer>();
cached.observeOn(Schedulers.computation()).subscribe(ts2);
ts2.awaitTerminalEvent(2, TimeUnit.SECONDS);
ts2.assertNoErrors();
ts2.assertComplete();
assertEquals(10000, ts2.values().size());
}
}
@Test
public void testAsyncComeAndGo() {
Observable<Long> source = Observable.interval(1, 1, TimeUnit.MILLISECONDS)
.take(1000)
.subscribeOn(Schedulers.io());
ObservableCache<Long> cached = (ObservableCache<Long>)ObservableCache.from(source);
Observable<Long> output = cached.observeOn(Schedulers.computation());
List<TestObserver<Long>> list = new ArrayList<TestObserver<Long>>(100);
for (int i = 0; i < 100; i++) {
TestObserver<Long> ts = new TestObserver<Long>();
list.add(ts);
output.skip(i * 10).take(10).subscribe(ts);
}
List<Long> expected = new ArrayList<Long>();
for (int i = 0; i < 10; i++) {
expected.add((long)(i - 10));
}
int j = 0;
for (TestObserver<Long> ts : list) {
ts.awaitTerminalEvent(3, TimeUnit.SECONDS);
ts.assertNoErrors();
ts.assertComplete();
for (int i = j * 10; i < j * 10 + 10; i++) {
expected.set(i - j * 10, (long)i);
}
ts.assertValueSequence(expected);
j++;
}
}
@Test
public void testNoMissingBackpressureException() {
final int m = 4 * 1000 * 1000;
Observable<Integer> firehose = Observable.unsafeCreate(new ObservableSource<Integer>() {
@Override
public void subscribe(Observer<? super Integer> t) {
t.onSubscribe(Disposables.empty());
for (int i = 0; i < m; i++) {
t.onNext(i);
}
t.onComplete();
}
});
TestObserver<Integer> ts = new TestObserver<Integer>();
firehose.cache().observeOn(Schedulers.computation()).takeLast(100).subscribe(ts);
ts.awaitTerminalEvent(3, TimeUnit.SECONDS);
ts.assertNoErrors();
ts.assertComplete();
assertEquals(100, ts.values().size());
}
@Test
public void testValuesAndThenError() {
Observable<Integer> source = Observable.range(1, 10)
.concatWith(Observable.<Integer>error(new TestException()))
.cache();
TestObserver<Integer> ts = new TestObserver<Integer>();
source.subscribe(ts);
ts.assertValues(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
ts.assertNotComplete();
ts.assertError(TestException.class);
TestObserver<Integer> ts2 = new TestObserver<Integer>();
source.subscribe(ts2);
ts2.assertValues(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
ts2.assertNotComplete();
ts2.assertError(TestException.class);
}
@Test
@Ignore("2.x consumers are not allowed to throw")
public void unsafeChildThrows() {
final AtomicInteger count = new AtomicInteger();
Observable<Integer> source = Observable.range(1, 100)
.doOnNext(new Consumer<Integer>() {
@Override
public void accept(Integer t) {
count.getAndIncrement();
}
})
.cache();
TestObserver<Integer> ts = new TestObserver<Integer>() {
@Override
public void onNext(Integer t) {
throw new TestException();
}
};
source.subscribe(ts);
Assert.assertEquals(100, count.get());
ts.assertNoValues();
ts.assertNotComplete();
ts.assertError(TestException.class);
}
@Test
public void observers() {
PublishSubject<Integer> ps = PublishSubject.create();
ObservableCache<Integer> cache = (ObservableCache<Integer>)Observable.range(1, 5).concatWith(ps).cache();
assertFalse(cache.hasObservers());
assertEquals(0, cache.cachedEventCount());
TestObserver<Integer> to = cache.test();
assertTrue(cache.hasObservers());
assertEquals(5, cache.cachedEventCount());
ps.onComplete();
to.assertResult(1, 2, 3, 4, 5);
}
@Test
public void disposeOnArrival() {
Observable.range(1, 5).cache()
.test(true)
.assertEmpty();
}
@Test
public void disposeOnArrival2() {
Observable<Integer> o = PublishSubject.<Integer>create().cache();
o.test();
o.test(true)
.assertEmpty();
}
@Test
public void dispose() {
TestHelper.checkDisposed(Observable.range(1, 5).cache());
}
@Test
public void take() {
Observable<Integer> cache = Observable.range(1, 5).cache();
cache.take(2).test().assertResult(1, 2);
cache.take(3).test().assertResult(1, 2, 3);
}
@Test
public void subscribeEmitRace() {
for (int i = 0; i < 500; i++) {
final PublishSubject<Integer> ps = PublishSubject.<Integer>create();
final Observable<Integer> cache = ps.cache();
cache.test();
final TestObserver<Integer> to = new TestObserver<Integer>();
Runnable r1 = new Runnable() {
@Override
public void run() {
cache.subscribe(to);
}
};
Runnable r2 = new Runnable() {
@Override
public void run() {
for (int j = 0; j < 500; j++) {
ps.onNext(j);
}
ps.onComplete();
}
};
TestHelper.race(r1, r2, Schedulers.single());
to
.awaitDone(5, TimeUnit.SECONDS)
.assertSubscribed().assertValueCount(500).assertComplete().assertNoErrors();
}
}
}