/*
* Copyright 2015 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 io.reactivex.netty.util;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.rules.ExternalResource;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
import rx.Observable;
import rx.exceptions.MissingBackpressureException;
import rx.observers.TestSubscriber;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
public class UnicastBufferingSubjectTest {
@Rule
public final ExpectedException expectedException = ExpectedException.none();
@Rule
public final SubjectRule rule = new SubjectRule();
@Test(timeout = 60000)
public void testSequentialSubscriptions() throws Exception {
String[] msgs = { "Hello1", "Hello2" };
rule.subject.onNext(msgs[0]);
rule.subscribeAndAssertValues(rule.subject.take(1), msgs[0]);
rule.subject.onNext(msgs[1]);
rule.subscribeAndAssertValues(rule.subject.take(1), msgs[1]);
}
@Test(timeout = 60000)
public void testConcurrentSubscriptions() throws Exception {
TestSubscriber<String> sub1 = new TestSubscriber<>();
rule.subject.subscribe(sub1);
sub1.assertNoTerminalEvent();
TestSubscriber<String> sub2 = new TestSubscriber<>();
rule.subject.subscribe(sub2);
sub2.assertError(IllegalStateException.class);
}
@Test(timeout = 60000)
public void testBufferCompletion() throws Exception {
rule.subject.onCompleted();
rule.subscribeAndAssertValues(rule.subject);
}
@Test(timeout = 60000)
public void testBufferError() throws Exception {
rule.subject.onError(new IllegalStateException());
TestSubscriber<String> sub = new TestSubscriber<>();
rule.subject.subscribe(sub);
sub.assertTerminalEvent();
sub.assertError(IllegalStateException.class);
}
@Test(timeout = 60000)
public void testUnsubscribeBeforeDemandComplete() throws Exception {
String[] msgs = { "Hello1", "Hello2" };
rule.subject.onNext(msgs[0]);
rule.subject.onNext(msgs[1]);
rule.subject.onCompleted();
rule.subscribeAndAssertValues(rule.subject.take(1), msgs[0]);
TestSubscriber<String> sub = new TestSubscriber<>(0);
rule.subject.subscribe(sub);
sub.assertNoTerminalEvent();
sub.assertNoValues();
sub.requestMore(1);
sub.assertTerminalEvent();
sub.assertNoErrors();
sub.assertValue(msgs[1]);
}
@Test(timeout = 60000)
public void testBufferOverflowWithOffer() throws Exception {
String[] msgs = { "Hello1", "Hello2" };
UnicastBufferingSubject<String> subject = UnicastBufferingSubject.create(1);
subject.onNext(msgs[0]);
boolean offered = subject.offerNext(msgs[1]);
assertThat("Offered passed when over capacity", offered, is(false));
}
@Test(timeout = 60000)
public void testBufferOverflowWithOnNext() throws Exception {
expectedException.expectCause(isA(MissingBackpressureException.class));
String[] msgs = { "Hello1", "Hello2" };
UnicastBufferingSubject<String> subject = UnicastBufferingSubject.create(1);
subject.onNext(msgs[0]);
subject.onNext(msgs[1]);
}
@Test(timeout = 60000)
public void testOverflowSubscribeAndThenAccept() throws Exception {
String[] msgs = { "Hello1", "Hello2" };
UnicastBufferingSubject<String> subject = UnicastBufferingSubject.create(1);
subject.onNext(msgs[0]);
boolean offered = subject.offerNext(msgs[1]);
assertThat("Offered passed when over capacity", offered, is(false));
TestSubscriber<String> subscriber = new TestSubscriber<>();
subject.subscribe(subscriber);
subscriber.assertNoTerminalEvent();
subscriber.assertValue(msgs[0]);
subject.onNext(msgs[1]);
subject.onCompleted();
subscriber.assertTerminalEvent();
subscriber.assertNoErrors();
subscriber.assertValues(msgs);
}
@Test(timeout = 60000)
public void testErrorPostSubscribe() throws Exception {
String[] msgs = { "Hello1", "Hello2" };
rule.subject.onNext(msgs[0]);
TestSubscriber<String> subscriber = new TestSubscriber<>();
rule.subject.subscribe(subscriber);
subscriber.assertNoTerminalEvent();
subscriber.assertValue(msgs[0]);
rule.subject.onError(new IllegalStateException());
subscriber.assertTerminalEvent();
subscriber.assertError(IllegalStateException.class);
}
private static class SubjectRule extends ExternalResource {
private UnicastBufferingSubject<String> subject;
@Override
public Statement apply(final Statement base, Description description) {
return new Statement() {
@Override
public void evaluate() throws Throwable {
subject = UnicastBufferingSubject.create(Long.MAX_VALUE);
base.evaluate();
}
};
}
public void subscribeAndAssertValues(Observable<String> source, String... values) {
TestSubscriber<String> sub1 = new TestSubscriber<>();
source.subscribe(sub1);
sub1.assertTerminalEvent();
sub1.assertNoErrors();
sub1.assertValues(values);
}
}
}