httpclient-osgi/src/test/java/org/apache/http/osgi/impl/WeakListTest.java

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 * to you under the Apache License, Version 2.0 (the
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package org.apache.http.osgi.impl;

import org.junit.Test;

import java.util.Iterator;
import java.util.NoSuchElementException;

import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertEquals;

public class WeakListTest {

    @Test
    public void testWeakList() {
        final WeakList<Object> list = new WeakList<Object>();
        list.add("hello");
        list.add(null);

        // null objects are seen as GC'd, so we only expect a size of 1
        assertEquals(1, list.size());

        final Iterator<Object> it = list.iterator();
        assertTrue(it.hasNext());
        assertEquals("hello", it.next());
        assertFalse(it.hasNext());
        boolean thrown = false;
        try {
            it.next();
        } catch (final NoSuchElementException e) {
            thrown = true;
        }
        assertTrue(thrown);
    }

    @Test
    public void clearSupported() {
        final WeakList<Object> list = new WeakList<Object>();

        list.add("hello");
        assertEquals(1, list.size());

        list.clear();
        assertEquals(0, list.size());
    }

}