/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.marshall;
import org.testng.annotations.Test;
/**
* Tests that the adaptive buffer size predictor adjusts sizes
* in different circumstances.
*
* @author Galder ZamarreƱo
* @since 5.0
*/
@Test(groups = "functional", testName = "marshall.AdaptiveBufferSizePredictorTest")
public class AdaptiveBufferSizePredictorTest {
public void testAdaptivenesOfBufferSizeChanges() throws Exception {
AdaptiveBufferSizePredictor predictor = new AdaptiveBufferSizePredictor();
int size = 32;
int nextSize;
int prevNextSize = AdaptiveBufferSizePredictor.DEFAULT_INITIAL;
for (int i = 0; i < 100; i++) {
predictor.recordSize(size);
nextSize = predictor.nextSize(null);
if (i % 2 != 0) {
if ((nextSize * 0.88) < size)
break;
else {
assert nextSize < prevNextSize;
prevNextSize = nextSize;
}
}
}
size = 32768;
for (int i = 0; i < 100; i++) {
predictor.recordSize(size);
nextSize = predictor.nextSize(null);
if ((nextSize * 0.89) > size) {
break;
} else {
assert nextSize > prevNextSize;
prevNextSize = nextSize;
}
}
}
}