assertNotNull(nestedCause);
        assertEquals(innerCause, nestedCause);
        assertEquals("Invalid parameter", nestedCause.getMessage());
    }

    @Test
    public void test_messageWithSpecialCharacters() {
        // Test message with special characters
        String message = "Theme error: 日本語 & special <characters> \"quoted\" 'text'";
        ThemeException exception = new ThemeException(message);

        assertNotNull(exception.getCause().getCause());
        assertEquals("Root problem", exception.getCause().getCause().getMessage());
    }

    @Test
    public void test_messageWithSpecialCharacters() {
        // Test constructor with message containing special characters
        String message = "GSA error: config file not found at /path/to/config.xml\n" + "Details: \"file\" does not exist\t[TAB]\r\n"

        // Verify
        assertNotNull(exception);
        assertEquals("", exception.getMessage());
        assertEquals(messageCode, exception.getMessageCode());
    }

    @Test
    public void test_messageWithSpecialCharacters() {
        // Setup
        final String message = "Error: Failed to authenticate user <******@****.***> with special chars: #$%&*()!@";

        assertNotNull(exception);
        assertEquals("", exception.getMessage());
        assertEquals(messageCode, exception.getMessageCode());
    }

    @Test
    public void test_messageWithSpecialCharacters() {
        // Setup
        final String message = "Query error: field:\"test value\" AND category:[A TO Z] OR tag:#hashtag @mention $special %wildcard";