/**
* 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.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.*;
import java.io.IOException;
import java.util.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import org.junit.Test;
import org.mockito.InOrder;
import io.reactivex.*;
import io.reactivex.Observable;
import io.reactivex.Observer;
import io.reactivex.disposables.*;
import io.reactivex.exceptions.*;
import io.reactivex.functions.*;
import io.reactivex.internal.functions.Functions;
import io.reactivex.observers.*;
import io.reactivex.schedulers.Schedulers;
import io.reactivex.subjects.PublishSubject;
public class ObservableRetryWithPredicateTest {
BiPredicate<Integer, Throwable> retryTwice = new BiPredicate<Integer, Throwable>() {
@Override
public boolean test(Integer t1, Throwable t2) {
return t1 <= 2;
}
};
BiPredicate<Integer, Throwable> retry5 = new BiPredicate<Integer, Throwable>() {
@Override
public boolean test(Integer t1, Throwable t2) {
return t1 <= 5;
}
};
BiPredicate<Integer, Throwable> retryOnTestException = new BiPredicate<Integer, Throwable>() {
@Override
public boolean test(Integer t1, Throwable t2) {
return t2 instanceof IOException;
}
};
@Test
public void testWithNothingToRetry() {
Observable<Integer> source = Observable.range(0, 3);
Observer<Integer> o = TestHelper.mockObserver();
InOrder inOrder = inOrder(o);
source.retry(retryTwice).subscribe(o);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(2);
inOrder.verify(o).onComplete();
verify(o, never()).onError(any(Throwable.class));
}
@Test
public void testRetryTwice() {
Observable<Integer> source = Observable.unsafeCreate(new ObservableSource<Integer>() {
int count;
@Override
public void subscribe(Observer<? super Integer> t1) {
t1.onSubscribe(Disposables.empty());
count++;
t1.onNext(0);
t1.onNext(1);
if (count == 1) {
t1.onError(new TestException());
return;
}
t1.onNext(2);
t1.onNext(3);
t1.onComplete();
}
});
@SuppressWarnings("unchecked")
DefaultObserver<Integer> o = mock(DefaultObserver.class);
InOrder inOrder = inOrder(o);
source.retry(retryTwice).subscribe(o);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(2);
inOrder.verify(o).onNext(3);
inOrder.verify(o).onComplete();
verify(o, never()).onError(any(Throwable.class));
}
@Test
public void testRetryTwiceAndGiveUp() {
Observable<Integer> source = Observable.unsafeCreate(new ObservableSource<Integer>() {
@Override
public void subscribe(Observer<? super Integer> t1) {
t1.onSubscribe(Disposables.empty());
t1.onNext(0);
t1.onNext(1);
t1.onError(new TestException());
}
});
@SuppressWarnings("unchecked")
DefaultObserver<Integer> o = mock(DefaultObserver.class);
InOrder inOrder = inOrder(o);
source.retry(retryTwice).subscribe(o);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onError(any(TestException.class));
verify(o, never()).onComplete();
}
@Test
public void testRetryOnSpecificException() {
Observable<Integer> source = Observable.unsafeCreate(new ObservableSource<Integer>() {
int count;
@Override
public void subscribe(Observer<? super Integer> t1) {
t1.onSubscribe(Disposables.empty());
count++;
t1.onNext(0);
t1.onNext(1);
if (count == 1) {
t1.onError(new IOException());
return;
}
t1.onNext(2);
t1.onNext(3);
t1.onComplete();
}
});
@SuppressWarnings("unchecked")
DefaultObserver<Integer> o = mock(DefaultObserver.class);
InOrder inOrder = inOrder(o);
source.retry(retryOnTestException).subscribe(o);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(2);
inOrder.verify(o).onNext(3);
inOrder.verify(o).onComplete();
verify(o, never()).onError(any(Throwable.class));
}
@Test
public void testRetryOnSpecificExceptionAndNotOther() {
final IOException ioe = new IOException();
final TestException te = new TestException();
Observable<Integer> source = Observable.unsafeCreate(new ObservableSource<Integer>() {
int count;
@Override
public void subscribe(Observer<? super Integer> t1) {
t1.onSubscribe(Disposables.empty());
count++;
t1.onNext(0);
t1.onNext(1);
if (count == 1) {
t1.onError(ioe);
return;
}
t1.onNext(2);
t1.onNext(3);
t1.onError(te);
}
});
@SuppressWarnings("unchecked")
DefaultObserver<Integer> o = mock(DefaultObserver.class);
InOrder inOrder = inOrder(o);
source.retry(retryOnTestException).subscribe(o);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(0);
inOrder.verify(o).onNext(1);
inOrder.verify(o).onNext(2);
inOrder.verify(o).onNext(3);
inOrder.verify(o).onError(te);
verify(o, never()).onError(ioe);
verify(o, never()).onComplete();
}
@Test
public void testUnsubscribeFromRetry() {
PublishSubject<Integer> subject = PublishSubject.create();
final AtomicInteger count = new AtomicInteger(0);
Disposable sub = subject.retry(retryTwice).subscribe(new Consumer<Integer>() {
@Override
public void accept(Integer n) {
count.incrementAndGet();
}
});
subject.onNext(1);
sub.dispose();
subject.onNext(2);
assertEquals(1, count.get());
}
@Test(timeout = 10000)
public void testUnsubscribeAfterError() {
Observer<Long> observer = TestHelper.mockObserver();
// Observable that always fails after 100ms
ObservableRetryTest.SlowObservable so = new ObservableRetryTest.SlowObservable(100, 0);
Observable<Long> o = Observable
.unsafeCreate(so)
.retry(retry5);
ObservableRetryTest.AsyncObserver<Long> async = new ObservableRetryTest.AsyncObserver<Long>(observer);
o.subscribe(async);
async.await();
InOrder inOrder = inOrder(observer);
// Should fail once
inOrder.verify(observer, times(1)).onError(any(Throwable.class));
inOrder.verify(observer, never()).onComplete();
assertEquals("Start 6 threads, retry 5 then fail on 6", 6, so.efforts.get());
assertEquals("Only 1 active subscription", 1, so.maxActive.get());
}
@Test(timeout = 10000)
public void testTimeoutWithRetry() {
Observer<Long> observer = TestHelper.mockObserver();
// Observable that sends every 100ms (timeout fails instead)
ObservableRetryTest.SlowObservable so = new ObservableRetryTest.SlowObservable(100, 10);
Observable<Long> o = Observable
.unsafeCreate(so)
.timeout(80, TimeUnit.MILLISECONDS)
.retry(retry5);
ObservableRetryTest.AsyncObserver<Long> async = new ObservableRetryTest.AsyncObserver<Long>(observer);
o.subscribe(async);
async.await();
InOrder inOrder = inOrder(observer);
// Should fail once
inOrder.verify(observer, times(1)).onError(any(Throwable.class));
inOrder.verify(observer, never()).onComplete();
assertEquals("Start 6 threads, retry 5 then fail on 6", 6, so.efforts.get());
}
@Test
public void testIssue2826() {
TestObserver<Integer> ts = new TestObserver<Integer>();
final RuntimeException e = new RuntimeException("You shall not pass");
final AtomicInteger c = new AtomicInteger();
Observable.just(1).map(new Function<Integer, Integer>() {
@Override
public Integer apply(Integer t1) {
c.incrementAndGet();
throw e;
}
}).retry(retry5).subscribe(ts);
ts.assertTerminated();
assertEquals(6, c.get());
assertEquals(Collections.singletonList(e), ts.errors());
}
@Test
public void testJustAndRetry() throws Exception {
final AtomicBoolean throwException = new AtomicBoolean(true);
int value = Observable.just(1).map(new Function<Integer, Integer>() {
@Override
public Integer apply(Integer t1) {
if (throwException.compareAndSet(true, false)) {
throw new TestException();
}
return t1;
}
}).retry(1).blockingSingle();
assertEquals(1, value);
}
@Test
public void testIssue3008RetryWithPredicate() {
final List<Long> list = new CopyOnWriteArrayList<Long>();
final AtomicBoolean isFirst = new AtomicBoolean(true);
Observable.<Long> just(1L, 2L, 3L).map(new Function<Long, Long>() {
@Override
public Long apply(Long x) {
System.out.println("map " + x);
if (x == 2 && isFirst.getAndSet(false)) {
throw new RuntimeException("retryable error");
}
return x;
}})
.retry(new BiPredicate<Integer, Throwable>() {
@Override
public boolean test(Integer t1, Throwable t2) {
return true;
}})
.forEach(new Consumer<Long>() {
@Override
public void accept(Long t) {
System.out.println(t);
list.add(t);
}});
assertEquals(Arrays.asList(1L,1L,2L,3L), list);
}
@Test
public void testIssue3008RetryInfinite() {
final List<Long> list = new CopyOnWriteArrayList<Long>();
final AtomicBoolean isFirst = new AtomicBoolean(true);
Observable.<Long> just(1L, 2L, 3L).map(new Function<Long, Long>() {
@Override
public Long apply(Long x) {
System.out.println("map " + x);
if (x == 2 && isFirst.getAndSet(false)) {
throw new RuntimeException("retryable error");
}
return x;
}})
.retry()
.forEach(new Consumer<Long>() {
@Override
public void accept(Long t) {
System.out.println(t);
list.add(t);
}});
assertEquals(Arrays.asList(1L,1L,2L,3L), list);
}
@Test
public void predicateThrows() {
TestObserver<Object> to = Observable.error(new TestException("Outer"))
.retry(new Predicate<Throwable>() {
@Override
public boolean test(Throwable e) throws Exception {
throw new TestException("Inner");
}
})
.test()
.assertFailure(CompositeException.class);
List<Throwable> errors = TestHelper.compositeList(to.errors().get(0));
TestHelper.assertError(errors, 0, TestException.class, "Outer");
TestHelper.assertError(errors, 1, TestException.class, "Inner");
}
@Test
public void dontRetry() {
Observable.error(new TestException("Outer"))
.retry(Functions.alwaysFalse())
.test()
.assertFailureAndMessage(TestException.class, "Outer");
}
@Test
public void retryDisposeRace() {
for (int i = 0; i < 500; i++) {
final PublishSubject<Integer> ps = PublishSubject.create();
final TestObserver<Integer> to = ps.retry(Functions.alwaysTrue()).test();
final TestException ex = new TestException();
Runnable r1 = new Runnable() {
@Override
public void run() {
ps.onError(ex);
}
};
Runnable r2 = new Runnable() {
@Override
public void run() {
to.cancel();
}
};
TestHelper.race(r1, r2, Schedulers.single());
to.assertEmpty();
}
}
@Test
public void bipredicateThrows() {
TestObserver<Object> to = Observable.error(new TestException("Outer"))
.retry(new BiPredicate<Integer, Throwable>() {
@Override
public boolean test(Integer n, Throwable e) throws Exception {
throw new TestException("Inner");
}
})
.test()
.assertFailure(CompositeException.class);
List<Throwable> errors = TestHelper.compositeList(to.errors().get(0));
TestHelper.assertError(errors, 0, TestException.class, "Outer");
TestHelper.assertError(errors, 1, TestException.class, "Inner");
}
@Test
public void retryBiPredicateDisposeRace() {
for (int i = 0; i < 500; i++) {
final PublishSubject<Integer> ps = PublishSubject.create();
final TestObserver<Integer> to = ps.retry(new BiPredicate<Object, Object>() {
@Override
public boolean test(Object t1, Object t2) throws Exception {
return true;
}
}).test();
final TestException ex = new TestException();
Runnable r1 = new Runnable() {
@Override
public void run() {
ps.onError(ex);
}
};
Runnable r2 = new Runnable() {
@Override
public void run() {
to.cancel();
}
};
TestHelper.race(r1, r2, Schedulers.single());
to.assertEmpty();
}
}
}