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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jrt;
import org.junit.After;
import org.junit.Before;
import java.util.Random;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
public class SchedulerTest {
long now; // fake time
Scheduler scheduler;
private class MyTask implements Runnable {
private Task task;
private long target;
private long actual = 0;
private boolean done = false;
private boolean multiple = false;
public MyTask(long target) {
task = new Task(scheduler, this);
this.target = target;
}
public void schedule() {
task.schedule(target / 1000.0);
}
public boolean unschedule() {
return task.unschedule();
}
public boolean kill() {
return task.kill();
}
public boolean done() {
return done;
}
public boolean check() {
if (!done || multiple) {
return false;
}
if (actual < target) {
return false;
}
// 3 * Scheduler.TICK == 300
return ((actual - target) <= 300);
}
public void run() {
multiple = done;
done = true;
actual = now;
}
}
private class RTTask implements Runnable {
private Task task;
private int cnt = 0;
public RTTask() {
task = new Task(scheduler, this);
}
public Task task() {
return task;
}
public void schedule() {
task.scheduleNow();
}
public boolean unschedule() {
return task.unschedule();
}
public boolean kill() {
return task.kill();
}
public int cnt() {
return cnt;
}
public void run() {
cnt++;
task.scheduleNow();
}
}
@Before
public void setUp() {
now = 0;
scheduler = new Scheduler(now);
}
@After
public void tearDown() {
scheduler = null;
}
@org.junit.Test
public void testTimeliness() {
Random rand = new Random(73201242);
RTTask rt1 = new RTTask();
RTTask rt2 = new RTTask();
RTTask rt3 = new RTTask();
rt1.schedule();
rt2.schedule();
rt3.schedule();
MyTask[] tasks = new MyTask[250000];
for (int i = 0; i < tasks.length; i++) {
tasks[i] = new MyTask(rand.nextInt(131072));
tasks[i].schedule();
}
int iterations = 0;
while (now < 135000) {
now += 10;
scheduler.checkTasks(now);
iterations++;
}
assertEquals(iterations, rt1.cnt());
assertEquals(iterations, rt2.cnt());
assertEquals(iterations, rt3.cnt());
for (int i = 0; i < tasks.length; i++) {
assertTrue(tasks[i].check());
}
}
@org.junit.Test
public void testUnschedule() {
MyTask t1 = new MyTask(1000);
MyTask t2 = new MyTask(1000);
MyTask t3 = new MyTask(1000);
MyTask t4 = new MyTask(1000);
MyTask t5 = new MyTask(1000);
RTTask rt1 = new RTTask();
RTTask rt2 = new RTTask();
RTTask rt3 = new RTTask();
RTTask rt4 = new RTTask();
RTTask rt5 = new RTTask();
assertFalse(t4.kill());
t1.schedule();
t2.schedule();
t3.schedule();
t4.schedule();
t5.schedule();
assertFalse(rt4.kill());
rt1.schedule();
rt2.schedule();
rt3.schedule();
rt4.schedule();
rt5.schedule();
assertTrue(t2.unschedule());
assertTrue(t1.unschedule());
assertTrue(t5.unschedule());
assertFalse(t2.unschedule());
assertFalse(t1.unschedule());
assertFalse(t5.unschedule());
t2.schedule();
t1.schedule();
assertTrue(t2.kill());
t2.schedule();
assertFalse(t2.kill());
int cnt = 0;
while (now < 5000) {
scheduler.checkTasks(now);
now += 10;
cnt++;
}
int old_cnt = cnt;
assertTrue(rt1.kill());
assertTrue(rt3.unschedule());
assertTrue(rt2.unschedule());
rt1.schedule();
rt2.schedule();
while (now < 10000) {
scheduler.checkTasks(now);
now += 10;
cnt++;
}
assertTrue(t1.check());
assertFalse(t2.done());
assertTrue(t3.check());
assertFalse(t4.done());
assertFalse(t5.done());
assertEquals(old_cnt, rt1.cnt());
assertEquals(cnt, rt2.cnt());
assertEquals(old_cnt, rt3.cnt());
assertEquals(0, rt4.cnt());
assertEquals(cnt, rt5.cnt());
}
@org.junit.Test
public void testSlowEventLoop() {
scheduler.checkTasks(now);
now += 10000;
MyTask task1 = new MyTask(5000);
task1.schedule();
int cnt1 = 0;
while (true) {
scheduler.checkTasks(now);
if (task1.done()) {
break;
}
cnt1++;
now += 10;
}
assertTrue(cnt1 > 400 && cnt1 < 500);
scheduler.checkTasks(now);
now += 10000;
MyTask task2 = new MyTask(5000);
task2.schedule();
int cnt2 = 0;
while (true) {
scheduler.checkTasks(now);
if (task2.done()) {
break;
}
cnt2++;
now += 10000;
}
assertTrue(cnt2 > 10 && cnt2 < 30);
}
}
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