WeakValueMapTest.java

package org.andork.collect;

import org.junit.Assert;
import org.junit.Test;

public class WeakValueMapTest {
	@Test
	public void test001() throws InterruptedException {
		WeakValueMap<String, Object> map = WeakValueMap.newWeakValueHashMap();

		Object o1 = new Object();

		map.put("Test", o1);

		Assert.assertEquals(o1, map.get("Test"));
		Assert.assertTrue(map.keySet().iterator().hasNext());
		Assert.assertTrue(map.values().iterator().hasNext());
		Assert.assertTrue(map.entrySet().iterator().hasNext());
		Assert.assertFalse(map.isEmpty());
		Assert.assertEquals(1, map.size());

		o1 = null;
		System.gc();
		Thread.sleep(100);
		System.gc();
		System.gc();

		Assert.assertFalse(map.keySet().iterator().hasNext());
		Assert.assertFalse(map.values().iterator().hasNext());
		Assert.assertFalse(map.entrySet().iterator().hasNext());
		Assert.assertEquals(null, map.get("Test"));
		Assert.assertTrue(map.isEmpty());
		Assert.assertEquals(0, map.size());
	}
}