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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.messagebus;
import org.junit.jupiter.api.Test;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import static org.junit.jupiter.api.Assertions.assertTrue;
/**
* @author Simon Thoresen Hult
*/
public class MessengerTestCase {
@Test
void requireThatSyncWithSelfDoesNotCauseDeadLock() throws InterruptedException {
final Messenger msn = new Messenger();
msn.start();
final CountDownLatch latch = new CountDownLatch(1);
msn.enqueue(new Messenger.Task() {
@Override
public void run() {
msn.sync();
}
@Override
public void destroy() {
latch.countDown();
}
});
assertTrue(latch.await(60, TimeUnit.SECONDS));
}
@Test
void requireThatTaskIsExecuted() throws InterruptedException {
Messenger msn = new Messenger();
msn.start();
assertTrue(tryMessenger(msn));
}
@Test
void requireThatRunExceptionIsCaught() throws InterruptedException {
Messenger msn = new Messenger();
msn.start();
msn.enqueue(new Messenger.Task() {
@Override
public void run() {
throw new RuntimeException();
}
@Override
public void destroy() {
}
});
assertTrue(tryMessenger(msn));
}
@Test
void requireThatDestroyExceptionIsCaught() throws InterruptedException {
Messenger msn = new Messenger();
msn.start();
msn.enqueue(new Messenger.Task() {
@Override
public void run() {
}
@Override
public void destroy() {
throw new RuntimeException();
}
});
assertTrue(tryMessenger(msn));
}
@Test
void requireThatRunAndDestroyExceptionsAreCaught() throws InterruptedException {
Messenger msn = new Messenger();
msn.start();
msn.enqueue(new Messenger.Task() {
@Override
public void run() {
throw new RuntimeException();
}
@Override
public void destroy() {
throw new RuntimeException();
}
});
assertTrue(tryMessenger(msn));
}
private static boolean tryMessenger(Messenger msn) {
MyTask task = new MyTask();
msn.enqueue(task);
try {
return task.runLatch.await(60, TimeUnit.SECONDS) &&
task.destroyLatch.await(60, TimeUnit.SECONDS);
} catch (InterruptedException e) {
return false;
}
}
private static class MyTask implements Messenger.Task {
final CountDownLatch runLatch = new CountDownLatch(1);
final CountDownLatch destroyLatch = new CountDownLatch(1);
@Override
public void run() {
runLatch.countDown();
}
@Override
public void destroy() {
destroyLatch.countDown();
}
}
}
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