assertThat(itr, is(notNullValue()));
        final URL url = itr.next();
        assertThat(url, is(notNullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testIsAncestor() throws Exception {
        final ClassLoader cl1 = new URLClassLoader(new URL[] { new URL("file:/foo") }, null);
        final ClassLoader cl2 = new URLClassLoader(new URL[] { new URL("file:/bar") }, cl1);