/*
* Copyright 2014, The Sporting Exchange Limited
*
* 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.betfair.cougar.transport.nio;
import java.util.Random;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import junit.framework.Assert;
import org.junit.Test;
import com.betfair.cougar.transport.nio.HealthMonitorStrategy.HealthMonitorStrategyListener;
public class DebounceHealthMonitorStrategyTest {
@Test
public void testInitialUpdate() throws InterruptedException {
DebounceHealthMonitorStrategy sut = new DebounceHealthMonitorStrategy(50);
final boolean[] result = new boolean[1];
sut.registerListener(new HealthMonitorStrategyListener() {
@Override
public void onUpdate(boolean isHealthy) {
result[0] = isHealthy;
}});
sut.update(true);
Assert.assertEquals(true, result[0]);
}
@Test
public void testUpdate() throws InterruptedException {
DebounceHealthMonitorStrategy sut = new DebounceHealthMonitorStrategy(50);
final boolean[] result = new boolean[1];
sut.registerListener(new HealthMonitorStrategyListener() {
@Override
public void onUpdate(boolean isHealthy) {
result[0] = isHealthy;
}
});
sut.update(true); //initial update
Assert.assertEquals(true, result[0]);
sut.update(false);//update
Thread.sleep(10);
Assert.assertEquals(true, result[0]); //shouldn't have updated yet
Thread.sleep(100);
Assert.assertEquals(false, result[0]);//should have updated by now
}
@Test
public void testUpdateCancelled() throws InterruptedException {
DebounceHealthMonitorStrategy sut = new DebounceHealthMonitorStrategy(50);
final boolean[] result = new boolean[1];
final int[] updateCount = new int[1];
sut.registerListener(new HealthMonitorStrategyListener() {
@Override
public void onUpdate(boolean isHealthy) {
result[0] = isHealthy;
updateCount[0]++;
}
});
sut.update(true);
Assert.assertEquals(true, result[0]);
sut.update(false);
Thread.sleep(10);
Assert.assertEquals(true, result[0]);//shouldn't have updated yet
sut.update(true); //should result in cancel of previous update
Thread.sleep(100);
Assert.assertEquals(true, result[0]);//should still be in inital state
Assert.assertEquals(1, updateCount[0]);
}
@Test
public void testUpdateAfterCancelled() throws InterruptedException {
DebounceHealthMonitorStrategy sut = new DebounceHealthMonitorStrategy(50);
final boolean[] result = new boolean[1];
final int[] updateCount = new int[1];
sut.registerListener(new HealthMonitorStrategyListener() {
@Override
public void onUpdate(boolean isHealthy) {
result[0] = isHealthy;
updateCount[0]++;
}
});
sut.update(true);
Assert.assertEquals(true, result[0]);
sut.update(false);
Thread.sleep(10);
Assert.assertEquals(true, result[0]);//shouldn't have updated yet
sut.update(true); //should result in cancel of previous update
Thread.sleep(100);
Assert.assertEquals(true, result[0]);//should still be in initial state
sut.update(false) ;
Thread.sleep(100);
Assert.assertEquals(false, result[0]);
Assert.assertEquals(2, updateCount[0]);
}
@Test
public void testConsecutiveUpdates() throws InterruptedException {
DebounceHealthMonitorStrategy sut = new DebounceHealthMonitorStrategy(50);
final boolean[] result = new boolean[1];
final int[] updateCount = new int[1];
sut.registerListener(new HealthMonitorStrategyListener() {
@Override
public void onUpdate(boolean isHealthy) {
result[0] = isHealthy;
updateCount[0]++;
}
});
sut.update(true);
Assert.assertEquals(true, result[0]);
sut.update(false);
Assert.assertEquals(true, result[0]);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(100);
Assert.assertEquals(false, result[0]);
Assert.assertEquals(2, updateCount[0]);
}
@Test
public void testConsecutiveUpdatesExceedDebounce() throws InterruptedException {
DebounceHealthMonitorStrategy sut = new DebounceHealthMonitorStrategy(50);
final boolean[] result = new boolean[1];
final int[] updateCount = new int[1];
sut.registerListener(new HealthMonitorStrategyListener() {
@Override
public void onUpdate(boolean isHealthy) {
result[0] = isHealthy;
updateCount[0]++;
}
});
sut.update(true);
Assert.assertEquals(true, result[0]);
sut.update(false);
Assert.assertEquals(true, result[0]);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
sut.update(false); //should not result in cancel of previous update
Thread.sleep(10);
Assert.assertEquals(false, result[0]);
Assert.assertEquals(2, updateCount[0]);
}
@Test
public void testUpdateToInitial() throws InterruptedException {
DebounceHealthMonitorStrategy sut = new DebounceHealthMonitorStrategy(50);
final int[] updateCount = new int[1];
sut.registerListener(new HealthMonitorStrategyListener() {
@Override
public void onUpdate(boolean isHealthy) {
updateCount[0]++;
}
});
sut.update(true);
Assert.assertEquals(1, updateCount[0]);
sut.update(true);
Assert.assertEquals(1, updateCount[0]);
Thread.sleep(100);
Assert.assertEquals(1, updateCount[0]);
}
@Test
public void gremlinTest() throws InterruptedException {
DebounceHealthMonitorStrategy sut = new DebounceHealthMonitorStrategy(50);
final boolean[] result = new boolean[1];
sut.registerListener(new HealthMonitorStrategyListener() {
@Override
public void onUpdate(boolean isHealthy) {
result[0] = isHealthy;
}
});
Random r = new Random();
boolean health = r.nextBoolean();
sut.update(health);
int sleep;
for (int i=0; i<100; i++) {
health = r.nextBoolean();
sut.update(health);
sleep = r.nextInt(10) < 8 ? 10 : 100;
Thread.sleep(sleep);
}
Thread.sleep(100);
Assert.assertEquals(health, result[0]);
}
}