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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.http.client.core;
import org.junit.Test;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.*;
public class ThrottlePolicyTest {
private final ThrottlePolicy throttlePolicy = new ThrottlePolicy();
// Default values for tests.
private int numOk = 1000;
private int prevOk = 1000;
private int prevMax = 100;
private int max = 100;
private boolean queued = true;
private double dynamicFactor = 0.1;
@Test
public void samePerformanceShouldTuneDown() {
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(95));
}
@Test
public void improvedPerformanceSameSizeShouldTuneDown() {
numOk += 200;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(89));
}
@Test
public void improvedPerformanceSmallerSizeTuneDownFurther() {
numOk += 200;
max = 70;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(63));
}
@Test
public void improvedPerformanceLargerSizeIncrease() {
numOk += 200;
max = 130;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(143));
dynamicFactor = 100;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(156));
}
@Test
public void improvedPerformanceLargerSizeButQueuedFalse() {
numOk += 200;
max = 130;
queued = false;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(128));
}
@Test
public void lowerPerformanceSameSizeShouldIncrease() {
numOk -= 200;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(110));
}
@Test
public void lowerPerformanceSmallerSizeShouldIncreaseSize() {
numOk -= 200;
max = 30;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(33));
dynamicFactor = 100;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(36));
}
@Test
public void lowerPerformanceLargerSizeTuneDownFurther() {
numOk -= 200;
max = 130;
assertThat(throttlePolicy.calcNewMaxInFlight(dynamicFactor, numOk, prevOk, prevMax, max, queued), is(116));
}
}
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