ReferenceQueue leaks demo

ReferenceQueueLeaks.java

/**
 * This demonstrates the leaks in ReferenceQueue.
 *
 * To run the demo, compile the source with:
 *
 *   j2objc ReferenceQueueLeaks.java
 *   j2objcc ReferenceQueueLeaks.m
 *
 * Then use the Leaks tool in Instruments and have it run "a.out ReferenceQueueLeaks".
 */

import java.lang.ref.ReferenceQueue;
import java.lang.ref.WeakReference;
import java.util.WeakHashMap;

import com.google.j2objc.annotations.AutoreleasePool;

public class ReferenceQueueLeaks {
  public static void main(String args[]) throws Exception {
    for (int i = 0; i < 20; i++) {
      System.out.println("testWeakHashMap " + i);
      testWeakHashMap();
      Thread.sleep(1000);
    }

    System.out.println("Sleep");
    Thread.sleep(30000);

    for (int i = 0; i < 20; i++) {
      System.out.println("testQueuedWeakReference " + i);
      testQueuedWeakReference();
      Thread.sleep(1000);
    }

    System.out.println("Sleep");
    Thread.sleep(15000);
    System.out.println("End");
  }

  @AutoreleasePool
  public static void testWeakHashMap() {
    WeakHashMap<Object, String> m = new WeakHashMap<>();
    m.put(new Object(), "some value");
  }

  public static WeakReference<?> weakRef;

  @AutoreleasePool
  public static void testQueuedWeakReference() {
    final boolean[] dealloced = { false };
    ReferenceQueue<? super Object> queue = new ReferenceQueue<Object>();
    for (@AutoreleasePool int i = 0; i < 1; i++) {
      Object referent = new Object() {
        public void finalize() {
          dealloced[0] = true;
        }
      };
      weakRef = new WeakReference<Object>(referent, queue);
    }

    if (weakRef.get() != null) {
      throw new AssertionError("Should be null");
    }
  }
}