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ErrorHandlingTests.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;
import static org.junit.Assert.assertNotNull;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import org.junit.Test;
import rx.schedulers.Schedulers;
public class ErrorHandlingTests {
/**
* Test that an error from a user provided Observer.onNext is handled and emitted to the onError
*/
@Test
public void testOnNextError() throws InterruptedException {
final CountDownLatch latch = new CountDownLatch(1);
final AtomicReference<Throwable> caughtError = new AtomicReference<Throwable>();
Observable<Long> o = Observable.interval(50, TimeUnit.MILLISECONDS);
Subscriber<Long> observer = new Subscriber<Long>() {
@Override
public void onCompleted() {
System.out.println("completed");
latch.countDown();
}
@Override
public void onError(Throwable e) {
System.out.println("error: " + e);
caughtError.set(e);
latch.countDown();
}
@Override
public void onNext(Long args) {
throw new RuntimeException("forced failure");
}
};
o.subscribe(observer);
latch.await(2000, TimeUnit.MILLISECONDS);
assertNotNull(caughtError.get());
}
/**
* Test that an error from a user provided Observer.onNext is handled and emitted to the onError
* even when done across thread boundaries with observeOn
*/
@Test
public void testOnNextErrorAcrossThread() throws InterruptedException {
final CountDownLatch latch = new CountDownLatch(1);
final AtomicReference<Throwable> caughtError = new AtomicReference<Throwable>();
Observable<Long> o = Observable.interval(50, TimeUnit.MILLISECONDS);
Subscriber<Long> observer = new Subscriber<Long>() {
@Override
public void onCompleted() {
System.out.println("completed");
latch.countDown();
}
@Override
public void onError(Throwable e) {
System.out.println("error: " + e);
caughtError.set(e);
latch.countDown();
}
@Override
public void onNext(Long args) {
throw new RuntimeException("forced failure");
}
};
o.observeOn(Schedulers.newThread()).subscribe(observer);
latch.await(2000, TimeUnit.MILLISECONDS);
assertNotNull(caughtError.get());
}
}