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R7507/core/src/test/java/com/yahoo/ycsb/generator/AcknowledgedCounterGeneratorTest.java
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AcknowledgedCounterGeneratorTest.java
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/**
* Copyright (c) 2015 YCSB contributors. 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. See accompanying
* LICENSE file.
*/
package com.yahoo.ycsb.generator;
import java.util.Random;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import org.testng.annotations.Test;
/**
* Tests for the AcknowledgedCounterGenerator class.
*/
public class AcknowledgedCounterGeneratorTest {
/**
* Test that advancing past {@link Integer#MAX_VALUE} works.
*/
@Test
public void testIncrementPastIntegerMaxValue() {
final long toTry = AcknowledgedCounterGenerator.WINDOW_SIZE * 3;
AcknowledgedCounterGenerator generator =
new AcknowledgedCounterGenerator(Integer.MAX_VALUE - 1000);
Random rand = new Random(System.currentTimeMillis());
BlockingQueue<Integer> pending = new ArrayBlockingQueue<Integer>(1000);
for (long i = 0; i < toTry; ++i) {
int value = generator.nextValue();
while (!pending.offer(value)) {
Integer first = pending.poll();
// Don't always advance by one.
if (rand.nextBoolean()) {
generator.acknowledge(first);
} else {
Integer second = pending.poll();
pending.add(first);
generator.acknowledge(second);
}
}
}
}
}
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