/**
* 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.operators;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import rx.Observable;
import rx.Observer;
import rx.Subscriber;
import rx.functions.Action1;
import rx.internal.util.RxRingBuffer;
import rx.observers.TestSubscriber;
public class OnSubscribeRangeTest {
@Test
public void testRangeStartAt2Count3() {
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
Observable.range(2, 3).subscribe(observer);
verify(observer, times(1)).onNext(2);
verify(observer, times(1)).onNext(3);
verify(observer, times(1)).onNext(4);
verify(observer, never()).onNext(5);
verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
verify(observer, times(1)).onCompleted();
}
@Test
public void testRangeUnsubscribe() {
@SuppressWarnings("unchecked")
Observer<Integer> observer = mock(Observer.class);
final AtomicInteger count = new AtomicInteger();
Observable.range(1, 1000).doOnNext(new Action1<Integer>() {
@Override
public void call(Integer t1) {
count.incrementAndGet();
}
}).take(3).subscribe(observer);
verify(observer, times(1)).onNext(1);
verify(observer, times(1)).onNext(2);
verify(observer, times(1)).onNext(3);
verify(observer, never()).onNext(4);
verify(observer, never()).onError(org.mockito.Matchers.any(Throwable.class));
verify(observer, times(1)).onCompleted();
assertEquals(3, count.get());
}
@Test
public void testRangeWithOverflow() {
Observable.range(1, 0);
}
@Test
public void testRangeWithOverflow2() {
Observable.range(Integer.MAX_VALUE, 0);
}
@Test
public void testRangeWithOverflow3() {
Observable.range(1, Integer.MAX_VALUE);
}
@Test(expected = IllegalArgumentException.class)
public void testRangeWithOverflow4() {
Observable.range(2, Integer.MAX_VALUE);
}
@Test
public void testRangeWithOverflow5() {
assertFalse(Observable.range(Integer.MIN_VALUE, 0).toBlocking().getIterator().hasNext());
}
@Test
public void testBackpressureViaRequest() {
OnSubscribeRange o = new OnSubscribeRange(1, RxRingBuffer.SIZE);
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
ts.assertReceivedOnNext(Collections.<Integer> emptyList());
ts.requestMore(1);
o.call(ts);
ts.assertReceivedOnNext(Arrays.asList(1));
ts.requestMore(2);
ts.assertReceivedOnNext(Arrays.asList(1, 2, 3));
ts.requestMore(3);
ts.assertReceivedOnNext(Arrays.asList(1, 2, 3, 4, 5, 6));
ts.requestMore(RxRingBuffer.SIZE);
ts.assertTerminalEvent();
}
@Test
public void testNoBackpressure() {
ArrayList<Integer> list = new ArrayList<Integer>(RxRingBuffer.SIZE * 2);
for (int i = 1; i <= RxRingBuffer.SIZE * 2 + 1; i++) {
list.add(i);
}
OnSubscribeRange o = new OnSubscribeRange(1, list.size());
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
ts.assertReceivedOnNext(Collections.<Integer> emptyList());
ts.requestMore(Long.MAX_VALUE); // infinite
o.call(ts);
ts.assertReceivedOnNext(list);
ts.assertTerminalEvent();
}
void testWithBackpressureOneByOne(int start) {
Observable<Integer> source = Observable.range(start, 100);
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
ts.requestMore(1);
source.subscribe(ts);
List<Integer> list = new ArrayList<Integer>(100);
for (int i = 0; i < 100; i++) {
list.add(i + start);
ts.requestMore(1);
}
ts.assertReceivedOnNext(list);
ts.assertTerminalEvent();
}
void testWithBackpressureAllAtOnce(int start) {
Observable<Integer> source = Observable.range(start, 100);
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
ts.requestMore(100);
source.subscribe(ts);
List<Integer> list = new ArrayList<Integer>(100);
for (int i = 0; i < 100; i++) {
list.add(i + start);
}
ts.assertReceivedOnNext(list);
ts.assertTerminalEvent();
}
@Test
public void testWithBackpressure1() {
for (int i = 0; i < 100; i++) {
testWithBackpressureOneByOne(i);
}
}
@Test
public void testWithBackpressureAllAtOnce() {
for (int i = 0; i < 100; i++) {
testWithBackpressureAllAtOnce(i);
}
}
@Test
public void testWithBackpressureRequestWayMore() {
Observable<Integer> source = Observable.range(50, 100);
TestSubscriber<Integer> ts = new TestSubscriber<Integer>();
ts.requestMore(150);
source.subscribe(ts);
List<Integer> list = new ArrayList<Integer>(100);
for (int i = 0; i < 100; i++) {
list.add(i + 50);
}
ts.requestMore(50); // and then some
ts.assertReceivedOnNext(list);
ts.assertTerminalEvent();
}
@Test
public void testRequestOverflow() {
final AtomicInteger count = new AtomicInteger();
int n = 10;
Observable.range(1, n).subscribe(new Subscriber<Integer>() {
@Override
public void onStart() {
request(2);
}
@Override
public void onCompleted() {
//do nothing
}
@Override
public void onError(Throwable e) {
throw new RuntimeException(e);
}
@Override
public void onNext(Integer t) {
count.incrementAndGet();
request(Long.MAX_VALUE - 1);
}});
assertEquals(n, count.get());
}
}