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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.jdisc;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assertions.fail;
/**
* @author Simon Thoresen Hult
*/
public class AbstractResourceTestCase {
@Test
void requireThatDestroyIsCalledWhenReleased() {
MyResource res = new MyResource();
assertFalse(res.destroyed);
res.release();
assertTrue(res.destroyed);
}
@Test
void requireThatDestroyIsCalledWhenRetainCountReachesZero() {
MyResource res = new MyResource();
assertEquals(1, res.retainCount());
assertFalse(res.destroyed);
final ResourceReference reference = res.refer();
assertEquals(2, res.retainCount());
res.release();
assertEquals(1, res.retainCount());
assertFalse(res.destroyed);
reference.close();
assertEquals(0, res.retainCount());
assertTrue(res.destroyed);
}
@Test
void requireThatDestroyIsCalledWhenRetainCountReachesZeroOppositeOrder() {
MyResource res = new MyResource();
assertEquals(1, res.retainCount());
assertFalse(res.destroyed);
final ResourceReference reference = res.refer();
assertEquals(2, res.retainCount());
reference.close();
assertEquals(1, res.retainCount());
assertFalse(res.destroyed);
res.release();
assertEquals(0, res.retainCount());
assertTrue(res.destroyed);
}
@Test
void requireThatReleaseCanOnlyBeCalledOnceEvenWhenReferenceCountIsPositive() {
MyResource res = new MyResource();
final ResourceReference secondReference = res.refer();
res.release();
try {
res.release();
fail();
} catch (IllegalStateException e) {
// As expected.
}
secondReference.close();
}
@Test
void requireThatSecondaryReferenceCanOnlyBeClosedOnceEvenWhenReferenceCountIsPositive() {
MyResource res = new MyResource();
final ResourceReference secondReference = res.refer();
secondReference.close();
try {
secondReference.close();
fail();
} catch (IllegalStateException e) {
// As expected.
}
res.release();
}
@Test
void requireThatReleaseAfterDestroyThrows() {
MyResource res = new MyResource();
res.release();
assertTrue(res.destroyed);
try {
res.release();
fail();
} catch (IllegalStateException e) {
}
assertEquals(0, res.retainCount());
try {
res.release();
fail();
} catch (IllegalStateException e) {
}
assertEquals(0, res.retainCount());
}
@Test
void requireThatReferAfterDestroyThrows() {
MyResource res = new MyResource();
res.release();
assertTrue(res.destroyed);
try {
res.refer();
fail();
} catch (IllegalStateException e) {
}
assertEquals(0, res.retainCount());
try {
res.refer();
fail();
} catch (IllegalStateException e) {
}
assertEquals(0, res.retainCount());
}
private static class MyResource extends AbstractResource {
boolean destroyed = false;
@Override
protected void destroy() {
destroyed = true;
}
}
}
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