/**
* 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 java.util.*;
import java.util.concurrent.TimeUnit;
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.internal.schedulers.IoScheduler;
import io.reactivex.observers.TestObserver;
import io.reactivex.schedulers.Schedulers;
public class ObservableMergeMaxConcurrentTest {
Observer<String> stringObserver;
@Before
public void before() {
stringObserver = TestHelper.mockObserver();
}
@Test
public void testWhenMaxConcurrentIsOne() {
for (int i = 0; i < 100; i++) {
List<Observable<String>> os = new ArrayList<Observable<String>>();
os.add(Observable.just("one", "two", "three", "four", "five").subscribeOn(Schedulers.newThread()));
os.add(Observable.just("one", "two", "three", "four", "five").subscribeOn(Schedulers.newThread()));
os.add(Observable.just("one", "two", "three", "four", "five").subscribeOn(Schedulers.newThread()));
List<String> expected = Arrays.asList("one", "two", "three", "four", "five", "one", "two", "three", "four", "five", "one", "two", "three", "four", "five");
Iterator<String> iter = Observable.merge(os, 1).blockingIterable().iterator();
List<String> actual = new ArrayList<String>();
while (iter.hasNext()) {
actual.add(iter.next());
}
assertEquals(expected, actual);
}
}
@Test
public void testMaxConcurrent() {
for (int times = 0; times < 100; times++) {
int observableCount = 100;
// Test maxConcurrent from 2 to 12
int maxConcurrent = 2 + (times % 10);
AtomicInteger subscriptionCount = new AtomicInteger(0);
List<Observable<String>> os = new ArrayList<Observable<String>>();
List<SubscriptionCheckObservable> scos = new ArrayList<SubscriptionCheckObservable>();
for (int i = 0; i < observableCount; i++) {
SubscriptionCheckObservable sco = new SubscriptionCheckObservable(subscriptionCount, maxConcurrent);
scos.add(sco);
os.add(Observable.unsafeCreate(sco));
}
Iterator<String> iter = Observable.merge(os, maxConcurrent).blockingIterable().iterator();
List<String> actual = new ArrayList<String>();
while (iter.hasNext()) {
actual.add(iter.next());
}
// System.out.println("actual: " + actual);
assertEquals(5 * observableCount, actual.size());
for (SubscriptionCheckObservable sco : scos) {
assertFalse(sco.failed);
}
}
}
private static class SubscriptionCheckObservable implements ObservableSource<String> {
private final AtomicInteger subscriptionCount;
private final int maxConcurrent;
volatile boolean failed;
SubscriptionCheckObservable(AtomicInteger subscriptionCount, int maxConcurrent) {
this.subscriptionCount = subscriptionCount;
this.maxConcurrent = maxConcurrent;
}
@Override
public void subscribe(final Observer<? super String> t1) {
t1.onSubscribe(Disposables.empty());
new Thread(new Runnable() {
@Override
public void run() {
if (subscriptionCount.incrementAndGet() > maxConcurrent) {
failed = true;
}
t1.onNext("one");
t1.onNext("two");
t1.onNext("three");
t1.onNext("four");
t1.onNext("five");
// We could not decrement subscriptionCount in the unsubscribe method
// as "unsubscribe" is not guaranteed to be called before the next "subscribe".
subscriptionCount.decrementAndGet();
t1.onComplete();
}
}).start();
}
}
@Test
public void testMergeALotOfSourcesOneByOneSynchronously() {
int n = 10000;
List<Observable<Integer>> sourceList = new ArrayList<Observable<Integer>>(n);
for (int i = 0; i < n; i++) {
sourceList.add(Observable.just(i));
}
Iterator<Integer> it = Observable.merge(Observable.fromIterable(sourceList), 1).blockingIterable().iterator();
int j = 0;
while (it.hasNext()) {
assertEquals((Integer)j, it.next());
j++;
}
assertEquals(j, n);
}
@Test
public void testMergeALotOfSourcesOneByOneSynchronouslyTakeHalf() {
int n = 10000;
List<Observable<Integer>> sourceList = new ArrayList<Observable<Integer>>(n);
for (int i = 0; i < n; i++) {
sourceList.add(Observable.just(i));
}
Iterator<Integer> it = Observable.merge(Observable.fromIterable(sourceList), 1).take(n / 2).blockingIterable().iterator();
int j = 0;
while (it.hasNext()) {
assertEquals((Integer)j, it.next());
j++;
}
assertEquals(j, n / 2);
}
@Test
public void testSimple() {
for (int i = 1; i < 100; i++) {
TestObserver<Integer> ts = new TestObserver<Integer>();
List<Observable<Integer>> sourceList = new ArrayList<Observable<Integer>>(i);
List<Integer> result = new ArrayList<Integer>(i);
for (int j = 1; j <= i; j++) {
sourceList.add(Observable.just(j));
result.add(j);
}
Observable.merge(sourceList, i).subscribe(ts);
ts.assertNoErrors();
ts.assertTerminated();
ts.assertValueSequence(result);
}
}
@Test
public void testSimpleOneLess() {
for (int i = 2; i < 100; i++) {
TestObserver<Integer> ts = new TestObserver<Integer>();
List<Observable<Integer>> sourceList = new ArrayList<Observable<Integer>>(i);
List<Integer> result = new ArrayList<Integer>(i);
for (int j = 1; j <= i; j++) {
sourceList.add(Observable.just(j));
result.add(j);
}
Observable.merge(sourceList, i - 1).subscribe(ts);
ts.assertNoErrors();
ts.assertTerminated();
ts.assertValueSequence(result);
}
}
@Test//(timeout = 20000)
public void testSimpleAsyncLoop() {
IoScheduler ios = (IoScheduler)Schedulers.io();
int c = ios.size();
for (int i = 0; i < 200; i++) {
testSimpleAsync();
int c1 = ios.size();
if (c + 60 < c1) {
throw new AssertionError("Worker leak: " + c + " - " + c1);
}
}
}
@Test(timeout = 10000)
public void testSimpleAsync() {
for (int i = 1; i < 50; i++) {
TestObserver<Integer> ts = new TestObserver<Integer>();
List<Observable<Integer>> sourceList = new ArrayList<Observable<Integer>>(i);
Set<Integer> expected = new HashSet<Integer>(i);
for (int j = 1; j <= i; j++) {
sourceList.add(Observable.just(j).subscribeOn(Schedulers.io()));
expected.add(j);
}
Observable.merge(sourceList, i).subscribe(ts);
ts.awaitTerminalEvent(1, TimeUnit.SECONDS);
ts.assertNoErrors();
Set<Integer> actual = new HashSet<Integer>(ts.values());
assertEquals(expected, actual);
}
}
@Test(timeout = 10000)
public void testSimpleOneLessAsyncLoop() {
for (int i = 0; i < 200; i++) {
testSimpleOneLessAsync();
}
}
@Test(timeout = 10000)
public void testSimpleOneLessAsync() {
long t = System.currentTimeMillis();
for (int i = 2; i < 50; i++) {
if (System.currentTimeMillis() - t > TimeUnit.SECONDS.toMillis(9)) {
break;
}
TestObserver<Integer> ts = new TestObserver<Integer>();
List<Observable<Integer>> sourceList = new ArrayList<Observable<Integer>>(i);
Set<Integer> expected = new HashSet<Integer>(i);
for (int j = 1; j <= i; j++) {
sourceList.add(Observable.just(j).subscribeOn(Schedulers.io()));
expected.add(j);
}
Observable.merge(sourceList, i - 1).subscribe(ts);
ts.awaitTerminalEvent(1, TimeUnit.SECONDS);
ts.assertNoErrors();
Set<Integer> actual = new HashSet<Integer>(ts.values());
assertEquals(expected, actual);
}
}
@Test(timeout = 5000)
public void testTake() throws Exception {
List<Observable<Integer>> sourceList = new ArrayList<Observable<Integer>>(3);
sourceList.add(Observable.range(0, 100000).subscribeOn(Schedulers.io()));
sourceList.add(Observable.range(0, 100000).subscribeOn(Schedulers.io()));
sourceList.add(Observable.range(0, 100000).subscribeOn(Schedulers.io()));
TestObserver<Integer> ts = new TestObserver<Integer>();
Observable.merge(sourceList, 2).take(5).subscribe(ts);
ts.awaitTerminalEvent();
ts.assertNoErrors();
ts.assertValueCount(5);
}
}