/**
* Copyright 2016 Netflix, Inc.
*
* 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 com.jakewharton.rxrelay3;
import io.reactivex.rxjava3.core.Observable;
import io.reactivex.rxjava3.core.Observer;
import io.reactivex.rxjava3.disposables.Disposable;
import io.reactivex.rxjava3.functions.Consumer;
import io.reactivex.rxjava3.functions.Function;
import io.reactivex.rxjava3.observers.DefaultObserver;
import io.reactivex.rxjava3.observers.TestObserver;
import io.reactivex.rxjava3.schedulers.Schedulers;
import java.util.ArrayList;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import org.mockito.InOrder;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.any;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
public class PublishRelayTest {
@Test
@SuppressWarnings("CheckReturnValue")
public void testNestedSubscribe() {
final PublishRelay<Integer> s = PublishRelay.create();
final AtomicInteger countParent = new AtomicInteger();
final AtomicInteger countChildren = new AtomicInteger();
final AtomicInteger countTotal = new AtomicInteger();
final ArrayList<String> list = new ArrayList<String>();
s.flatMap(new Function<Integer, Observable<String>>() {
@Override
public Observable<String> apply(final Integer v) {
countParent.incrementAndGet();
// then subscribe to subject again (it will not receive the previous value)
return s.map(new Function<Integer, String>() {
@Override
public String apply(Integer v2) {
countChildren.incrementAndGet();
return "Parent: " + v + " Child: " + v2;
}
});
}
}).subscribe(new Consumer<String>() {
@Override
public void accept(String v) {
countTotal.incrementAndGet();
list.add(v);
}
});
for (int i = 0; i < 10; i++) {
s.accept(i);
}
// System.out.println("countParent: " + countParent.get());
// System.out.println("countChildren: " + countChildren.get());
// System.out.println("countTotal: " + countTotal.get());
// 9+8+7+6+5+4+3+2+1+0 == 45
assertEquals(45, list.size());
}
/**
* Should be able to unsubscribe all Subscribers, have it stop emitting, then subscribe new ones and it start emitting again.
*/
@Test
public void testReSubscribe() {
final PublishRelay<Integer> ps = PublishRelay.create();
Observer<Integer> o1 = TestHelper.mockObserver();
TestObserver<Integer> ts = new TestObserver<Integer>(o1);
ps.subscribe(ts);
// emit
ps.accept(1);
// validate we got it
InOrder inOrder1 = inOrder(o1);
inOrder1.verify(o1, times(1)).onNext(1);
inOrder1.verifyNoMoreInteractions();
// unsubscribe
ts.dispose();
// emit again but nothing will be there to receive it
ps.accept(2);
Observer<Integer> o2 = TestHelper.mockObserver();
TestObserver<Integer> ts2 = new TestObserver<Integer>(o2);
ps.subscribe(ts2);
// emit
ps.accept(3);
// validate we got it
InOrder inOrder2 = inOrder(o2);
inOrder2.verify(o2, times(1)).onNext(3);
inOrder2.verifyNoMoreInteractions();
ts2.dispose();
}
@Test(timeout = 1000)
public void testUnsubscriptionCase() {
PublishRelay<String> src = PublishRelay.create();
for (int i = 0; i < 10; i++) {
final Observer<Object> o = TestHelper.mockObserver();
InOrder inOrder = inOrder(o);
String v = "" + i;
System.out.printf("Turn: %d%n", i);
src.firstElement()
.toObservable()
.flatMap(new Function<String, Observable<String>>() {
@Override
public Observable<String> apply(String t1) {
return Observable.just(t1 + ", " + t1);
}
})
.subscribe(new DefaultObserver<String>() {
@Override
public void onNext(String t) {
o.onNext(t);
}
@Override
public void onError(Throwable e) {
o.onError(e);
}
@Override
public void onComplete() {
o.onComplete();
}
});
src.accept(v);
inOrder.verify(o).onNext(v + ", " + v);
inOrder.verify(o).onComplete();
verify(o, never()).onError(any(Throwable.class));
}
}
@Test
public void crossCancel() {
final TestObserver<Integer> ts1 = new TestObserver<Integer>();
TestObserver<Integer> ts2 = new TestObserver<Integer>() {
@Override
public void onNext(Integer t) {
super.onNext(t);
ts1.dispose();
}
};
PublishRelay<Integer> pp = PublishRelay.create();
pp.subscribe(ts2);
pp.subscribe(ts1);
pp.accept(1);
ts2.assertValue(1);
ts1.assertNoValues();
}
@Test
public void onSubscribeCancelsImmediately() {
PublishRelay<Integer> pp = PublishRelay.create();
TestObserver<Integer> ts = pp.test();
pp.subscribe(new Observer<Integer>() {
@Override
public void onSubscribe(Disposable s) {
s.dispose();
s.dispose();
}
@Override
public void onNext(Integer t) {
}
@Override
public void onError(Throwable t) {
}
@Override
public void onComplete() {
}
});
ts.dispose();
assertFalse(pp.hasObservers());
}
@Test
public void addRemoveRance() throws Exception {
for (int i = 0; i < 100; i++) {
final PublishRelay<Integer> pp = PublishRelay.create();
final TestObserver<Integer> ts = pp.test();
Runnable r1 = new Runnable() {
@Override
public void run() {
pp.subscribe();
}
};
Runnable r2 = new Runnable() {
@Override
public void run() {
ts.dispose();
}
};
TestHelper.race(r1, r2, Schedulers.io());
}
}
@Test
public void nullOnNext() {
PublishRelay<Integer> pp = PublishRelay.create();
TestObserver<Integer> ts = pp.test();
assertTrue(pp.hasObservers());
try {
pp.accept(null);
fail();
} catch (NullPointerException e) {
assertEquals("value == null", e.getMessage());
}
}
@Test
@SuppressWarnings("CheckReturnValue")
public void subscribedTo() {
PublishRelay<Integer> pp = PublishRelay.create();
PublishRelay<Integer> pp2 = PublishRelay.create();
pp.subscribe(pp2);
TestObserver<Integer> ts = pp2.test();
pp.accept(1);
pp.accept(2);
ts.assertValues(1, 2);
}
}
