assertArgumentNotNull("classLoader", classLoader);
        this.classLoader = classLoader;
    }

    @Override
    public boolean hasNext() {
        return classLoader != null;
    }

    @Override
    public ClassLoader next() {
        if (!hasNext()) {
            throw new NoSuchElementException();
        }
        final ClassLoader result = classLoader;

     * @param locale the locale
     * @param classLoader the class loader (must not be {@literal null} or empty)
     * @return {@link ResourceBundle}
     * @see ResourceBundle#getBundle(String, Locale, ClassLoader)
     */
    public static final ResourceBundle getBundle(final String name, final Locale locale, final ClassLoader classLoader) {
        assertArgumentNotNull("name", name);

    /**
     * @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);
        final ClassLoader cl3 = new URLClassLoader(new URL[] { new URL("file:/baz") }, cl2);

        assertThat(ClassLoaderUtil.isAncestor(cl3, cl2), is(true));

   * disallows certain core JDK classes.
   */
  private void runTestMethod(ClassLoader classLoader) throws Exception {
    ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();

    Thread.currentThread().setContextClassLoader(classLoader);
    try {
      Class<?> test = classLoader.loadClass(AbstractFutureTest.class.getName());

     */
    public static ClassLoader getClassLoader(final Class<?> targetClass) {
        assertArgumentNotNull("targetClass", targetClass);

        final ClassLoader contextClassLoader = Thread.currentThread().getContextClassLoader();
        if (contextClassLoader != null) {
            return contextClassLoader;
        }

        final ClassLoader targetClassLoader = targetClass.getClassLoader();

        assertTrue(exceptionHandled.get());
    }

    // Test with a custom ClassLoader to simulate class availability
    public void test_hook_withCustomClassLoader() throws Exception {
        // Create a custom ClassLoader that can control class loading behavior
        ClassLoader customClassLoader = new URLClassLoader(new URL[0], null) {
            @Override

   * disallows certain core JDK classes.
   */
  private void runTestMethod(ClassLoader classLoader) throws Exception {
    ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();

    Thread.currentThread().setContextClassLoader(classLoader);
    try {
      Class<?> test = classLoader.loadClass(AbstractFutureTest.class.getName());

   * Runs the corresponding {@link FuturesTest} test method in a new classloader that disallows
   * certain core JDK classes.
   */
  private void runTestMethod(ClassLoader classLoader) throws Exception {
    ClassLoader oldClassLoader = Thread.currentThread().getContextClassLoader();
    Thread.currentThread().setContextClassLoader(classLoader);
    try {
      Class<?> test = classLoader.loadClass(FuturesTest.class.getName());

    /**
     * @throws Exception
     */
    @Test
    public void test() 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);
        final ClassLoader cl3 = new URLClassLoader(new URL[] { new URL("file:/baz") }, cl2);

        final ClassLoaderIterator it = new ClassLoaderIterator(cl3);

            HtmlTagBasedGenerator generator = new HtmlTagBasedGenerator();
            ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
            File outputFile = File.createTempFile("generator_", ".png");

            String imagePath = "thumbnail/600x400.png";
            try (ImageInputStream input = ImageIO.createImageInputStream(classLoader.getResourceAsStream(imagePath))) {
                generator.saveImage(input, outputFile);