/** isQueued(null) throws NullPointerException */
public void testIsQueuedNPE() {
final Mutex sync = new Mutex();
try {
sync.isQueued(null);
shouldThrow();
} catch (NullPointerException success) {
}
}
/** isQueued reports whether a thread is queued */
public void testIsQueued() {
final Mutex sync = new Mutex();
Thread t1 = new Thread(new InterruptedSyncRunnable(sync));
Thread t2 = new Thread(new InterruptibleSyncRunnable(sync));
assertFalse(sync.isQueued(t1));
assertFalse(sync.isQueued(t2));
sync.acquire();
t1.start();
waitForQueuedThread(sync, t1);
assertTrue(sync.isQueued(t1));
assertFalse(sync.isQueued(t2));
t2.start();
waitForQueuedThread(sync, t2);
assertTrue(sync.isQueued(t1));
assertTrue(sync.isQueued(t2));
t1.interrupt();
awaitTermination(t1);
assertFalse(sync.isQueued(t1));
assertTrue(sync.isQueued(t2));
sync.release();
awaitTermination(t2);
assertFalse(sync.isQueued(t1));
assertFalse(sync.isQueued(t2));
}