*/
    @Test
    public void testReadBytes_NullFile() {
        try {
            FileUtil.readBytes(null);
            fail("Expected IllegalArgumentException");
        } catch (final IllegalArgumentException e) {
            // Expected
        }
    }

    /**
     * Test isPathSafe with null path throws exception
     */
    @Test

        try {
            settings.badword().add("aaaa");
            assertTrue(true);
        } catch (IllegalArgumentException e) {
            fail();
        }

        try {
            settings.badword().add("");
            fail();
        } catch (IllegalArgumentException e) {
            assertTrue(true);
        }

        try {
            settings.badword().add("aaaa bbb");

        if (StringUtil.isBlank(path)) {
            throw new IllegalArgumentException("File path cannot be empty");
        }
        try {
            final Path filePath = Paths.get(path).normalize();
            final String normalizedPath = filePath.toString();
            if (normalizedPath.contains("..")) {
                throw new IllegalArgumentException("Invalid file path");
            }

     */
    public void testCreateCustomFilter_NullPatterns() {
        try {
            SerializeUtil.createCustomFilter(null);
            fail("Expected IllegalArgumentException");
        } catch (final IllegalArgumentException e) {
            // Expected
        }
    }

    /**
     * Test serialization with empty array
     *
     * @throws Exception
     */

     */
    public Deferred<T>.Promise execute(final Client client) {
        final String error = getValidationError();
        if (!Strings.isNullOrEmpty(error)) {
            throw new IllegalArgumentException(error);
        }

        final Deferred<T> deferred = new Deferred<>();
        try {
            processRequest(client, deferred);
        } catch (final Exception e) {

        assertEquals("another", result.get(2));
    }

    @Test(expected = IllegalArgumentException.class)
    public void testGetAsListWithArray() {
        // Test with array (should throw exception)
        String[] array = { "one", "two" };
        SuggestUtil.getAsList(array);
    }

    @Test(expected = IllegalArgumentException.class)
    public void testGetAsListWithDouble() {

     * @param queryCommand the query command implementation to add
     * @throws IllegalArgumentException if name or queryCommand is null
     */
    public void add(final String name, final QueryCommand queryCommand) {
        if (name == null || queryCommand == null) {
            throw new IllegalArgumentException(

     * @return complete URL with context path and optional timestamp parameter
     * @throws IllegalArgumentException if input is null or doesn't start with '/'
     */
    public static String url(final String input) {
        if (input == null) {
            final String msg = "The argument 'input' should not be null.";
            throw new IllegalArgumentException(msg);
        }
        if (!input.startsWith("/")) {

     * @param badWord Bad word
     */
    public void add(final String badWord) {
        final String validationError = getValidationError(badWord);
        if (validationError != null) {
            throw new IllegalArgumentException("Validation error: " + validationError);
        }

        if (logger.isDebugEnabled()) {
            logger.debug("Adding bad word: index={}, word={}", arraySettings.arraySettingsIndexName, badWord);
        }

     * @param scriptEngine The script engine.
     */
    public void add(final String name, final ScriptEngine scriptEngine) {
        if (name == null || scriptEngine == null) {
            throw new IllegalArgumentException(
                    "Both name and scriptEngine parameters are required. name: " + name + ", scriptEngine: " + scriptEngine);
        }
        if (logger.isDebugEnabled()) {