assertEquals(result, htmlTransformer.encodeUrl(url, "UTF-8"));

        url = ".-*_:/+%=&?#[]@~!$'(),;";
        result = ".-*_:/+%=&?#[]@~!$'(),;";
        assertEquals(result, htmlTransformer.encodeUrl(url, "UTF-8"));
    }

    public void test_isSupportedCharset_valid() {

            final String childUrlValue = attrValue.trim();
            final URI childUri = childUrlValue.startsWith("?") ? new URI(uri.toString() + childUrlValue) : uri.resolve(childUrlValue);
            final String u = encodeUrl(normalizeUrl(childUri.toString()), encoding);
            if (logger.isDebugEnabled()) {
                logger.debug("{} -> {}", attrValue, u);
            }
            if (StringUtil.isNotBlank(u)) {

            } catch (final ExecutionException e) {
                logger.debug("Failed to access resource hash cache: path={}", input, e);
            }
        }
        return LaResponseUtil.getResponse().encodeURL(sb.toString());
    }

    /**
     * Encodes a string for similar document hash processing.
     *
     * @param input the string to encode
     * @return encoded string, or the original input if blank