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Java example source code file (PromiseCombinerTest.java)
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The PromiseCombinerTest.java Java example source code
/*
* Copyright 2016 The Netty Project
*
* The Netty Project licenses this file to you 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.netty.util.concurrent;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
public class PromiseCombinerTest {
@Mock
private Promise<Void> p1;
private GenericFutureListener<Future l1;
private GenericFutureListenerConsumer l1Consumer = new GenericFutureListenerConsumer() {
@Override
public void accept(GenericFutureListener<Future listener) {
l1 = listener;
}
};
@Mock
private Promise<Void> p2;
private GenericFutureListener<Future l2;
private GenericFutureListenerConsumer l2Consumer = new GenericFutureListenerConsumer() {
@Override
public void accept(GenericFutureListener<Future listener) {
l2 = listener;
}
};
@Mock
private Promise<Void> p3;
private PromiseCombiner combiner;
@Before
public void setup() {
MockitoAnnotations.initMocks(this);
combiner = new PromiseCombiner();
}
@Test
public void testNullAggregatePromise() {
combiner.finish(p1);
verify(p1).trySuccess(any(Void.class));
}
@Test(expected = NullPointerException.class)
public void testAddNullPromise() {
combiner.add(null);
}
@Test(expected = NullPointerException.class)
public void testAddAllNullPromise() {
combiner.addAll(null);
}
@Test(expected = IllegalStateException.class)
public void testAddAfterFinish() {
combiner.finish(p1);
combiner.add(p2);
}
@SuppressWarnings("unchecked")
@Test(expected = IllegalStateException.class)
public void testAddAllAfterFinish() {
combiner.finish(p1);
combiner.addAll(p2);
}
@SuppressWarnings("unchecked")
@Test(expected = IllegalStateException.class)
public void testFinishCalledTwiceThrows() {
combiner.finish(p1);
combiner.finish(p1);
}
@Test
public void testAddAllSuccess() throws Exception {
mockSuccessPromise(p1, l1Consumer);
mockSuccessPromise(p2, l2Consumer);
combiner.addAll(p1, p2);
combiner.finish(p3);
l1.operationComplete(p1);
verifyNotCompleted(p3);
l2.operationComplete(p2);
verifySuccess(p3);
}
@Test
public void testAddSuccess() throws Exception {
mockSuccessPromise(p1, l1Consumer);
mockSuccessPromise(p2, l2Consumer);
combiner.add(p1);
l1.operationComplete(p1);
combiner.add(p2);
l2.operationComplete(p2);
verifyNotCompleted(p3);
combiner.finish(p3);
verifySuccess(p3);
}
@Test
public void testAddAllFail() throws Exception {
RuntimeException e1 = new RuntimeException("fake exception 1");
RuntimeException e2 = new RuntimeException("fake exception 2");
mockFailedPromise(p1, e1, l1Consumer);
mockFailedPromise(p2, e2, l2Consumer);
combiner.addAll(p1, p2);
combiner.finish(p3);
l1.operationComplete(p1);
verifyNotCompleted(p3);
l2.operationComplete(p2);
verifyFail(p3, e1);
}
@Test
public void testAddFail() throws Exception {
RuntimeException e1 = new RuntimeException("fake exception 1");
RuntimeException e2 = new RuntimeException("fake exception 2");
mockFailedPromise(p1, e1, l1Consumer);
mockFailedPromise(p2, e2, l2Consumer);
combiner.add(p1);
l1.operationComplete(p1);
combiner.add(p2);
l2.operationComplete(p2);
verifyNotCompleted(p3);
combiner.finish(p3);
verifyFail(p3, e1);
}
private void verifyFail(Promise<Void> p, Throwable cause) {
verify(p).tryFailure(eq(cause));
}
private void verifySuccess(Promise<Void> p) {
verify(p).trySuccess(any(Void.class));
}
private void verifyNotCompleted(Promise<Void> p) {
verify(p, never()).trySuccess(any(Void.class));
verify(p, never()).tryFailure(any(Throwable.class));
verify(p, never()).setSuccess(any(Void.class));
verify(p, never()).setFailure(any(Throwable.class));
}
private void mockSuccessPromise(Promise<Void> p, GenericFutureListenerConsumer consumer) {
when(p.isDone()).thenReturn(true);
when(p.isSuccess()).thenReturn(true);
mockListener(p, consumer);
}
private void mockFailedPromise(Promise<Void> p, Throwable cause, GenericFutureListenerConsumer consumer) {
when(p.isDone()).thenReturn(true);
when(p.isSuccess()).thenReturn(false);
when(p.cause()).thenReturn(cause);
mockListener(p, consumer);
}
@SuppressWarnings("unchecked")
private void mockListener(final Promise<Void> p, final GenericFutureListenerConsumer consumer) {
doAnswer(new Answer<Promise() {
@SuppressWarnings("unchecked")
@Override
public Promise<Void> answer(InvocationOnMock invocation) throws Throwable {
consumer.accept(invocation.getArgumentAt(0, GenericFutureListener.class));
return p;
}
}).when(p).addListener(any(GenericFutureListener.class));
}
interface GenericFutureListenerConsumer {
void accept(GenericFutureListener<Future listener);
}
}
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