package org.infinispan.commons.marshall;
import org.infinispan.commons.marshall.AdaptiveBufferSizePredictor;
import org.testng.annotations.Test;
/**
* Tests that the adaptive buffer size predictor adjusts sizes
* in different circumstances.
*
* @author Galder Zamarreño
* @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;
}
}
}
}