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/*******************************************************************************
* Copyright (c) 2007 Oracle. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0, which accompanies this distribution
* and is available at http://www.eclipse.org/legal/epl-v10.html.
*
* Contributors:
* Oracle - initial API and implementation
******************************************************************************/
package org.eclipse.jpt.utility.tests.internal;
import org.eclipse.jpt.utility.internal.SynchronizedBoolean;
import junit.framework.TestCase;
public class SynchronizedBooleanTests extends TestCase {
private volatile SynchronizedBoolean sb;
private volatile boolean exCaught;
private volatile boolean timeoutOccurred;
private volatile long startTime;
private volatile long endTime;
public SynchronizedBooleanTests(String name) {
super(name);
}
@Override
protected void setUp() throws Exception {
super.setUp();
this.sb = new SynchronizedBoolean();
this.exCaught = false;
this.timeoutOccurred = false;
this.startTime = 0;
this.endTime = 0;
}
@Override
protected void tearDown() throws Exception {
TestTools.clear(this);
super.tearDown();
}
public void testAccessors() throws Exception {
this.sb.setValue(false);
assertFalse(this.sb.value());
assertFalse(this.sb.isTrue());
assertTrue(this.sb.isFalse());
this.sb.setValue(true);
assertTrue(this.sb.value());
assertTrue(this.sb.isTrue());
assertFalse(this.sb.isFalse());
this.sb.setFalse();
assertFalse(this.sb.value());
assertFalse(this.sb.isTrue());
assertTrue(this.sb.isFalse());
this.sb.setTrue();
assertTrue(this.sb.value());
assertTrue(this.sb.isTrue());
assertFalse(this.sb.isFalse());
assertSame(this.sb, this.sb.mutex());
}
public void testEquals() throws Exception {
this.sb.setValue(false);
SynchronizedBoolean sb2 = new SynchronizedBoolean(false);
assertEquals(this.sb, sb2);
this.sb.setValue(true);
assertFalse(this.sb.equals(sb2));
sb2.setValue(true);
assertEquals(this.sb, sb2);
}
public void testHashCode() {
this.sb.setValue(false);
assertEquals(0, this.sb.hashCode());
this.sb.setValue(true);
assertEquals(1, this.sb.hashCode());
}
public void testWaitUntilTrue() throws Exception {
this.verifyWaitUntilTrue(0);
// no timeout occurs...
assertFalse(this.timeoutOccurred);
// ...and the value should be set to true by t2
assertTrue(this.sb.value());
// make a reasonable guess about how long t2 took
assertTrue(this.elapsedTime() > 150);
}
public void testWaitUntilTrueTimeout() throws Exception {
this.verifyWaitUntilTrue(20);
// timeout occurs...
assertTrue(this.timeoutOccurred);
// ...and the value will eventually be set to true by t1
assertTrue(this.sb.value());
// make a reasonable guess about how long t2 took
assertTrue(this.elapsedTime() < 150);
}
private void verifyWaitUntilTrue(long timeout) throws Exception {
this.sb.setFalse();
Runnable r1 = this.buildRunnable(this.buildSetTrueCommand(), this.sb, 200);
Runnable r2 = this.buildRunnable(this.buildWaitUntilTrueCommand(timeout), this.sb, 0);
Thread t1 = new Thread(r1);
Thread t2 = new Thread(r2);
t1.start();
t2.start();
while (t1.isAlive() || t2.isAlive()) {
Thread.sleep(50);
}
assertFalse(this.exCaught);
}
public void testWaitToSetFalse() throws Exception {
this.verifyWaitToSetFalse(0);
// no timeout occurs...
assertFalse(this.timeoutOccurred);
// ...and the value should be set to false by t2
assertFalse(this.sb.value());
// make a reasonable guess about how long t2 took
assertTrue(this.elapsedTime() > 150);
}
public void testWaitToSetFalseTimeout() throws Exception {
this.verifyWaitToSetFalse(20);
// timeout occurs...
assertTrue(this.timeoutOccurred);
// ...and the value will eventually be set to true by t1
assertTrue(this.sb.value());
// make a reasonable guess about how long t2 took
assertTrue(this.elapsedTime() < 150);
}
private void verifyWaitToSetFalse(long timeout) throws Exception {
this.sb.setFalse();
Runnable r1 = this.buildRunnable(this.buildSetTrueCommand(), this.sb, 200);
Runnable r2 = this.buildRunnable(this.buildWaitToSetFalseCommand(timeout), this.sb, 0);
Thread t1 = new Thread(r1);
Thread t2 = new Thread(r2);
t1.start();
t2.start();
while (t1.isAlive() || t2.isAlive()) {
Thread.sleep(50);
}
assertFalse(this.exCaught);
}
private Command buildSetTrueCommand() {
return new Command() {
public void execute(SynchronizedBoolean syncBool) {
syncBool.setTrue();
}
};
}
private Command buildWaitUntilTrueCommand(final long timeout) {
return new Command() {
public void execute(SynchronizedBoolean syncBool) throws Exception {
SynchronizedBooleanTests.this.setStartTime(System.currentTimeMillis());
SynchronizedBooleanTests.this.setTimeoutOccurred( ! syncBool.waitUntilTrue(timeout));
SynchronizedBooleanTests.this.setEndTime(System.currentTimeMillis());
}
};
}
private Command buildWaitToSetFalseCommand(final long timeout) {
return new Command() {
public void execute(SynchronizedBoolean syncBool) throws Exception {
SynchronizedBooleanTests.this.setStartTime(System.currentTimeMillis());
SynchronizedBooleanTests.this.setTimeoutOccurred( ! syncBool.waitToSetFalse(timeout));
SynchronizedBooleanTests.this.setEndTime(System.currentTimeMillis());
}
};
}
private Runnable buildRunnable(final Command command, final SynchronizedBoolean syncBool, final long sleep) {
return new Runnable() {
public void run() {
try {
if (sleep != 0) {
Thread.sleep(sleep);
}
command.execute(syncBool);
} catch (Exception ex) {
SynchronizedBooleanTests.this.setExCaught(true);
}
}
};
}
void setExCaught(boolean exCaught) {
this.exCaught = exCaught;
}
void setTimeoutOccurred(boolean timeoutOccurred) {
this.timeoutOccurred = timeoutOccurred;
}
void setStartTime(long startTime) {
this.startTime = startTime;
}
void setEndTime(long endTime) {
this.endTime = endTime;
}
long elapsedTime() {
return this.endTime - this.startTime;
}
// ********** Command interface **********
private interface Command {
void execute(SynchronizedBoolean syncBool) throws Exception;
}
}
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