/**
* 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.internal.util;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.util.Arrays;
import org.junit.Test;
import rx.exceptions.MissingBackpressureException;
import rx.observers.TestSubscriber;
public abstract class RxRingBufferBase {
protected abstract RxRingBuffer createRingBuffer();
@Test
public void missingBackpressureException() throws MissingBackpressureException {
RxRingBuffer b = createRingBuffer();
TestSubscriber<Object> s = new TestSubscriber<Object>();
s.requestMore(RxRingBuffer.SIZE);
for (int i = 0; i < RxRingBuffer.SIZE; i++) {
b.onNext("one");
}
try {
b.onNext("o");
fail("expected failure adding beyond size");
} catch (Exception e) {
// expecting failure
assertTrue(e instanceof MissingBackpressureException);
}
}
@Test
public void addAndPollFailBackpressure() throws MissingBackpressureException {
RxRingBuffer b = createRingBuffer();
try {
for (int i = 0; i < RxRingBuffer.SIZE; i++) {
// System.out.println("Add: " + i);
b.onNext("one");
}
} catch (Exception e) {
e.printStackTrace();
}
b.poll();
b.onNext("o");
try {
b.onNext("o");
fail("expected failure adding beyond size");
} catch (Exception e) {
// expecting failure
assertTrue(e instanceof MissingBackpressureException);
}
}
@Test
public void addAndPoll() throws MissingBackpressureException {
RxRingBuffer b = createRingBuffer();
b.onNext("o");
b.onNext("o");
b.poll();
b.poll();
b.onNext("o");
b.onNext("o");
}
@Test
public void roomForError() throws MissingBackpressureException {
RxRingBuffer b = createRingBuffer();
TestSubscriber<Object> s = new TestSubscriber<Object>();
s.requestMore(RxRingBuffer.SIZE);
for (int i = 0; i < RxRingBuffer.SIZE; i++) {
b.onNext("one");
}
// should act full now
try {
b.onNext("should-fail");
fail("expected error");
} catch (Exception e) {
// we want this
b.onError(new MissingBackpressureException());
}
}
@Test
public void multipleTerminalEventsOnComplete() throws MissingBackpressureException {
RxRingBuffer b = createRingBuffer();
TestSubscriber<Object> s = new TestSubscriber<Object>();
s.requestMore(RxRingBuffer.SIZE);
for (int i = 0; i < RxRingBuffer.SIZE; i++) {
b.onNext("one");
}
// queue is now full
b.onError(new RuntimeException("an error"));
try {
b.onCompleted();
// we ignore duplicate terminal events
} catch (IllegalStateException e) {
fail("we will ignore duplicate terminal events");
}
}
@Test
public void multipleTerminalEventsOnError() throws MissingBackpressureException {
RxRingBuffer b = createRingBuffer();
TestSubscriber<Object> s = new TestSubscriber<Object>();
s.requestMore(RxRingBuffer.SIZE);
for (int i = 0; i < RxRingBuffer.SIZE; i++) {
b.onNext("one");
}
// queue is now full
b.onCompleted();
try {
b.onError(new RuntimeException("an error"));
// we ignore duplicate terminal events
} catch (IllegalStateException e) {
fail("we will ignore duplicate terminal events");
}
}
@Test(timeout = 500)
public void testPollingTerminalState() throws MissingBackpressureException {
RxRingBuffer b = createRingBuffer();
b.onNext(1);
b.onCompleted();
TestSubscriber<Object> s = new TestSubscriber<Object>();
Object o = null;
while ((o = b.poll()) != null) {
if (b.isCompleted(o)) {
s.onCompleted();
} else {
s.onNext(o);
}
}
s.awaitTerminalEvent();
s.assertReceivedOnNext(Arrays.<Object> asList(1));
}
}