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/*
* Written by Doug Lea with assistance from members of JCP JSR-166
* Expert Group and released to the public domain, as explained at
* http://creativecommons.org/publicdomain/zero/1.0/
* Other contributors include Andrew Wright, Jeffrey Hayes,
* Pat Fisher, Mike Judd.
*/
package jsr166;
import junit.framework.Test;
import junit.framework.TestSuite;
public class ThreadLocalTest extends JSR166TestCase {
// android-note: Removed because the CTS runner does a bad job of
// retrying tests that have suite() declarations.
//
// public static void main(String[] args) {
// main(suite(), args);
// }
// public static Test suite() {
// return new TestSuite(...);
// }
static ThreadLocal<Integer> tl = new ThreadLocal<Integer>() {
public Integer initialValue() {
return one;
}
};
static InheritableThreadLocal<Integer> itl =
new InheritableThreadLocal<Integer>() {
protected Integer initialValue() {
return zero;
}
protected Integer childValue(Integer parentValue) {
return new Integer(parentValue.intValue() + 1);
}
};
/**
* remove causes next access to return initial value
*/
public void testRemove() {
assertSame(tl.get(), one);
tl.set(two);
assertSame(tl.get(), two);
tl.remove();
assertSame(tl.get(), one);
}
/**
* remove in InheritableThreadLocal causes next access to return
* initial value
*/
public void testRemoveITL() {
assertSame(itl.get(), zero);
itl.set(two);
assertSame(itl.get(), two);
itl.remove();
assertSame(itl.get(), zero);
}
private class ITLThread extends Thread {
final int[] x;
ITLThread(int[] array) { x = array; }
public void run() {
Thread child = null;
if (itl.get().intValue() < x.length - 1) {
child = new ITLThread(x);
child.start();
}
Thread.yield();
int threadId = itl.get().intValue();
for (int j = 0; j < threadId; j++) {
x[threadId]++;
Thread.yield();
}
if (child != null) { // Wait for child (if any)
try {
child.join();
} catch (InterruptedException e) {
threadUnexpectedException(e);
}
}
}
}
/**
* InheritableThreadLocal propagates generic values.
*/
public void testGenericITL() throws InterruptedException {
final int threadCount = 10;
final int[] x = new int[threadCount];
Thread progenitor = new ITLThread(x);
progenitor.start();
progenitor.join();
for (int i = 0; i < threadCount; i++) {
assertEquals(i, x[i]);
}
}
}
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