/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.collection.impl.queue;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.IQueue;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.HazelcastTestSupport;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import java.util.Iterator;
import java.util.NoSuchElementException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.fail;
@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class})
public class QueueIteratorTest extends HazelcastTestSupport {
@Test
public void testIterator() {
IQueue<String> queue = newQueue();
for (int i = 0; i < 10; i++) {
queue.offer("item" + i);
}
Iterator<String> iterator = queue.iterator();
int i = 0;
while (iterator.hasNext()) {
Object o = iterator.next();
assertEquals(o, "item" + i++);
}
}
@Test
public void testIterator_whenQueueEmpty() {
IQueue<String> queue = newQueue();
Iterator<String> iterator = queue.iterator();
assertFalse(iterator.hasNext());
try {
assertNull(iterator.next());
fail();
} catch (NoSuchElementException e) {
ignore(e);
}
}
@Test
public void testIteratorRemove() {
IQueue<String> queue = newQueue();
for (int i = 0; i < 10; i++) {
queue.offer("item" + i);
}
Iterator<String> iterator = queue.iterator();
iterator.next();
try {
iterator.remove();
fail();
} catch (UnsupportedOperationException e) {
ignore(e);
}
assertEquals(10, queue.size());
}
private IQueue<String> newQueue() {
HazelcastInstance instance = createHazelcastInstance();
return instance.getQueue(randomString());
}
}