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ExceptionsTest.java
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/**
* Copyright 2014 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 rx.exceptions;
import static org.junit.Assert.*;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import rx.*;
import rx.functions.*;
import rx.observables.GroupedObservable;
import rx.subjects.PublishSubject;
public class ExceptionsTest {
@Test
public void constructorShouldBePrivate() {
TestUtil.checkUtilityClass(Exceptions.class);
}
@Test(expected = OnErrorNotImplementedException.class)
public void testOnErrorNotImplementedIsThrown() {
Observable.just(1, 2, 3).subscribe(new Action1<Integer>() {
@Override
public void call(Integer t1) {
throw new RuntimeException("hello");
}
});
}
/**
* https://github.com/ReactiveX/RxJava/issues/3885
*/
@Test(expected = OnCompletedFailedException.class)
public void testOnCompletedExceptionIsThrown() {
Observable.empty()
.subscribe(new Subscriber<Object>() {
@Override
public void onCompleted() {
throw new RuntimeException();
}
@Override
public void onError(Throwable e) {
}
@Override
public void onNext(Object o) {
}
});
}
@Test
public void testStackOverflowWouldOccur() {
final PublishSubject<Integer> a = PublishSubject.create();
final PublishSubject<Integer> b = PublishSubject.create();
final int MAX_STACK_DEPTH = 800;
final AtomicInteger depth = new AtomicInteger();
a.subscribe(new Observer<Integer>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
e.printStackTrace();
}
@Override
public void onNext(Integer n) {
b.onNext(n + 1);
}
});
b.subscribe(new Observer<Integer>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
e.printStackTrace();
}
@Override
public void onNext(Integer n) {
if (depth.get() < MAX_STACK_DEPTH) {
depth.set(Thread.currentThread().getStackTrace().length);
a.onNext(n + 1);
}
}
});
a.onNext(1);
assertTrue(depth.get() > MAX_STACK_DEPTH);
}
@Test(expected = StackOverflowError.class)
public void testStackOverflowErrorIsThrown() {
Observable.just(1).subscribe(new Observer<Integer>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
e.printStackTrace();
}
@Override
public void onNext(Integer t) {
throw new StackOverflowError();
}
});
}
@Test(expected = ThreadDeath.class)
public void testThreadDeathIsThrown() {
Observable.just(1).subscribe(new Observer<Integer>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
e.printStackTrace();
}
@Override
public void onNext(Integer t) {
throw new ThreadDeath();
}
});
}
/**
* https://github.com/ReactiveX/RxJava/issues/969
*/
@Test
public void testOnErrorExceptionIsThrown() {
try {
Observable.error(new IllegalArgumentException("original exception")).subscribe(new Observer<Object>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
throw new IllegalStateException("This should be thrown");
}
@Override
public void onNext(Object o) {
}
});
fail("expecting an exception to be thrown");
} catch (OnErrorFailedException t) {
CompositeException cause = (CompositeException) t.getCause();
assertTrue(cause.getExceptions().get(0) instanceof IllegalArgumentException);
assertTrue(cause.getExceptions().get(1) instanceof IllegalStateException);
}
}
/**
* https://github.com/ReactiveX/RxJava/issues/2998
* @throws Exception on arbitrary errors
*/
@Test(expected = OnErrorFailedException.class)
public void testOnErrorExceptionIsThrownFromGroupBy() throws Exception {
Observable
.just(1)
.groupBy(new Func1<Integer, Integer>() {
@Override
public Integer call(Integer integer) {
throw new RuntimeException();
}
})
.subscribe(new Observer<GroupedObservable<Integer, Integer>>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
throw new RuntimeException();
}
@Override
public void onNext(GroupedObservable<Integer, Integer> integerIntegerGroupedObservable) {
}
});
}
/**
* https://github.com/ReactiveX/RxJava/issues/2998
* @throws Exception on arbitrary errors
*/
@Test(expected = OnErrorFailedException.class)
public void testOnErrorExceptionIsThrownFromOnNext() throws Exception {
Observable
.just(1)
.doOnNext(new Action1<Integer>() {
@Override
public void call(Integer integer) {
throw new RuntimeException();
}
})
.subscribe(new Observer<Integer>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
throw new RuntimeException();
}
@Override
public void onNext(Integer integer) {
}
});
}
@Test(expected = OnErrorFailedException.class)
public void testOnErrorExceptionIsThrownFromSubscribe() {
Observable.create(new Observable.OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> s1) {
Observable.create(new Observable.OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> s2) {
throw new IllegalArgumentException("original exception");
}
}).subscribe(s1);
}
}
).subscribe(new OnErrorFailedSubscriber());
}
@Test(expected = OnErrorFailedException.class)
public void testOnErrorExceptionIsThrownFromUnsafeSubscribe() {
Observable.create(new Observable.OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> s1) {
Observable.create(new Observable.OnSubscribe<Integer>() {
@Override
public void call(Subscriber<? super Integer> s2) {
throw new IllegalArgumentException("original exception");
}
}).unsafeSubscribe(s1);
}
}
).subscribe(new OnErrorFailedSubscriber());
}
@Test(expected = OnErrorFailedException.class)
public void testOnErrorExceptionIsThrownFromSingleDoOnSuccess() throws Exception {
Single.just(1)
.doOnSuccess(new Action1<Integer>() {
@Override
public void call(Integer integer) {
throw new RuntimeException();
}
})
.subscribe(new OnErrorFailedSubscriber());
}
@Test(expected = OnErrorFailedException.class)
public void testOnErrorExceptionIsThrownFromSingleSubscribe() {
Single.create(new Single.OnSubscribe<Integer>() {
@Override
public void call(SingleSubscriber<? super Integer> s1) {
Single.create(new Single.OnSubscribe<Integer>() {
@Override
public void call(SingleSubscriber<? super Integer> s2) {
throw new IllegalArgumentException("original exception");
}
}).subscribe(s1);
}
}
).subscribe(new OnErrorFailedSubscriber());
}
@Test(expected = OnErrorFailedException.class)
public void testOnErrorExceptionIsThrownFromSingleUnsafeSubscribe() {
Single.create(new Single.OnSubscribe<Integer>() {
@Override
public void call(final SingleSubscriber<? super Integer> s1) {
Single.create(new Single.OnSubscribe<Integer>() {
@Override
public void call(SingleSubscriber<? super Integer> s2) {
throw new IllegalArgumentException("original exception");
}
}).unsafeSubscribe(new Subscriber<Integer>() {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
s1.onError(e);
}
@Override
public void onNext(Integer v) {
s1.onSuccess(v);
}
});
}
}
).subscribe(new OnErrorFailedSubscriber());
}
private class OnErrorFailedSubscriber extends Subscriber<Integer> {
@Override
public void onCompleted() {
}
@Override
public void onError(Throwable e) {
throw new RuntimeException();
}
@Override
public void onNext(Integer value) {
}
}
}