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/*
* Copyright 2015 Open Networking Laboratory
*
* 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 org.onlab.util;
import org.junit.Test;
import java.util.List;
import java.util.stream.IntStream;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.onlab.junit.TestTools.assertAfter;
/**
* Tests the operation of the accumulator.
*/
public class AbstractAccumulatorTest {
private final ManuallyAdvancingTimer timer = new ManuallyAdvancingTimer(true);
private static final int LONG_REAL_TIME_DELAY = 30;
private static final int SHORT_REAL_TIME_DELAY = 5;
@Test
public void basics() throws Exception {
TestAccumulator accumulator = new TestAccumulator();
assertEquals("incorrect timer", timer, accumulator.timer());
assertEquals("incorrect max events", 5, accumulator.maxItems());
assertEquals("incorrect max ms", 100, accumulator.maxBatchMillis());
assertEquals("incorrect idle ms", 70, accumulator.maxIdleMillis());
}
@Test
public void eventTrigger() {
TestAccumulator accumulator = new TestAccumulator();
accumulator.add(new TestItem("a"));
accumulator.add(new TestItem("b"));
accumulator.add(new TestItem("c"));
accumulator.add(new TestItem("d"));
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.add(new TestItem("e"));
timer.advanceTimeMillis(20, LONG_REAL_TIME_DELAY);
assertFalse("should have fired", accumulator.batch.isEmpty());
assertEquals("incorrect batch", "abcde", accumulator.batch);
}
@Test
public void timeTrigger() {
TestAccumulator accumulator = new TestAccumulator();
accumulator.add(new TestItem("a"));
timer.advanceTimeMillis(30, SHORT_REAL_TIME_DELAY);
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.add(new TestItem("b"));
timer.advanceTimeMillis(30, SHORT_REAL_TIME_DELAY);
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.add(new TestItem("c"));
timer.advanceTimeMillis(30, SHORT_REAL_TIME_DELAY);
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.add(new TestItem("d"));
timer.advanceTimeMillis(10, LONG_REAL_TIME_DELAY);
assertFalse("should have fired", accumulator.batch.isEmpty());
assertEquals("incorrect batch", "abcd", accumulator.batch);
}
@Test
public void idleTrigger() {
TestAccumulator accumulator = new TestAccumulator();
accumulator.add(new TestItem("a"));
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.add(new TestItem("b"));
timer.advanceTimeMillis(70, LONG_REAL_TIME_DELAY);
assertFalse("should have fired", accumulator.batch.isEmpty());
assertEquals("incorrect batch", "ab", accumulator.batch);
}
@Test
public void readyIdleTrigger() {
TestAccumulator accumulator = new TestAccumulator();
accumulator.ready = false;
accumulator.add(new TestItem("a"));
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.add(new TestItem("b"));
timer.advanceTimeMillis(80, SHORT_REAL_TIME_DELAY);
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.ready = true;
timer.advanceTimeMillis(80, LONG_REAL_TIME_DELAY);
assertFalse("should have fired", accumulator.batch.isEmpty());
assertEquals("incorrect batch", "ab", accumulator.batch);
}
@Test
public void readyLongTrigger() {
TestAccumulator accumulator = new TestAccumulator();
accumulator.ready = false;
timer.advanceTimeMillis(120, SHORT_REAL_TIME_DELAY);
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.add(new TestItem("a"));
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.ready = true;
timer.advanceTimeMillis(120, LONG_REAL_TIME_DELAY);
assertFalse("should have fired", accumulator.batch.isEmpty());
assertEquals("incorrect batch", "a", accumulator.batch);
}
@Test
public void readyMaxTrigger() {
TestAccumulator accumulator = new TestAccumulator();
accumulator.ready = false;
accumulator.add(new TestItem("a"));
accumulator.add(new TestItem("b"));
accumulator.add(new TestItem("c"));
accumulator.add(new TestItem("d"));
accumulator.add(new TestItem("e"));
accumulator.add(new TestItem("f"));
assertTrue("should not have fired yet", accumulator.batch.isEmpty());
accumulator.ready = true;
accumulator.add(new TestItem("g"));
timer.advanceTimeMillis(10, LONG_REAL_TIME_DELAY);
assertFalse("should have fired", accumulator.batch.isEmpty());
assertEquals("incorrect batch", "abcdefg", accumulator.batch);
}
@Test
public void stormTest() {
TestAccumulator accumulator = new TestAccumulator();
IntStream.range(0, 1000).forEach(i -> accumulator.add(new TestItem("#" + i)));
timer.advanceTimeMillis(1);
assertAfter(100, () -> assertEquals("wrong item count", 1000, accumulator.itemCount));
assertEquals("wrong batch count", 200, accumulator.batchCount);
}
private class TestItem {
private final String s;
public TestItem(String s) {
this.s = s;
}
}
private class TestAccumulator extends AbstractAccumulator<TestItem> {
String batch = "";
boolean ready = true;
int batchCount = 0;
int itemCount = 0;
protected TestAccumulator() {
super(timer, 5, 100, 70);
}
@Override
public void processItems(List<TestItem> items) {
batchCount++;
itemCount += items.size();
for (TestItem item : items) {
batch += item.s;
}
}
@Override
public boolean isReady() {
return ready;
}
}
}
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