/*
* Copyright 2002-2017 the original author or authors.
*
* 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 org.springframework.http.server.reactive;
import java.io.IOException;
import org.junit.Test;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;
import org.springframework.core.io.buffer.DataBuffer;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.isA;
import static org.mockito.Mockito.mock;
import static org.junit.Assert.assertTrue;
/**
* Unit tests for {@link AbstractListenerReadPublisher}
*
* @author Violeta Georgieva
* @since 5.0
*/
public class ListenerReadPublisherTests {
@Test
@SuppressWarnings("unchecked")
public void testReceiveTwoRequestCallsWhenOnSubscribe() {
Subscriber<DataBuffer> subscriber = mock(Subscriber.class);
doAnswer(new SubscriptionAnswer()).when(subscriber).onSubscribe(isA(Subscription.class));
TestListenerReadPublisher publisher = new TestListenerReadPublisher();
publisher.subscribe(subscriber);
publisher.onDataAvailable();
assertTrue(publisher.getReadCalls() == 2);
}
private static final class TestListenerReadPublisher extends AbstractListenerReadPublisher {
private int readCalls = 0;
@Override
protected void checkOnDataAvailable() {
// no-op
}
@Override
protected DataBuffer read() throws IOException {
readCalls++;
return mock(DataBuffer.class);
}
public int getReadCalls() {
return this.readCalls;
}
}
private static final class SubscriptionAnswer implements Answer<Subscription> {
@Override
public Subscription answer(InvocationOnMock invocation) throws Throwable {
Subscription arg = (Subscription) invocation.getArguments()[0];
arg.request(1);
arg.request(1);
return arg;
}
}
}