String hash = "01010101010101010101010101010101";
        String value = "$H4sIAAAAAAAA_zMwNMALAXC7sg0gAAAA";
        assertEquals(value, documentHelper.encodeSimilarDocHash(hash));
        hash = "00101010010010100100101010001010";
        value = "$H4sIAAAAAAAA_zMwMARDCELQQApMAgAi5-3LIAAAAA";
        assertEquals(value, documentHelper.encodeSimilarDocHash(hash));

    }

    /**
     * Encodes a similar document hash using GZIP compression and Base64 encoding.
     * This reduces storage space for hash values while maintaining uniqueness.
     *
     * @param hash the hash string to encode
     * @return the encoded hash string with prefix, or the original hash if encoding fails
     */
    public String encodeSimilarDocHash(final String hash) {

        // Same inputs and output should have same hash code
        assertEquals(item1.hashCode(), item2.hashCode());

        // Different inputs should have different hash code
        assertNotSame(item1.hashCode(), item3.hashCode());

        // Same inputs but different output should have different hash code
        assertNotSame(item1.hashCode(), item4.hashCode());
    }

    @Test

        final StringBuilder buf = new StringBuilder(50);
        for (int i = 0; i < docid.length(); i += splitSize) {
            int hash = docid.substring(i).hashCode() % splitHashSize;
            if (hash < 0) {
                hash *= -1;
            }
            buf.append('_').append(Integer.toString(hash)).append('/');
        }
        buf.append(docid).append('.').append(imageExtention);
        return buf.toString();
    }

     * Encodes special characters using URL encoding or Base64 encoding as needed,
     * then applies a message digest algorithm to create a unique hash.
     *
     * @param urlId the URL ID string to generate a hash for
     * @return a hashed ID string generated from the input URL ID
     */
    protected String generateId(final String urlId) {

        try {
            final MessageDigest md = MessageDigest.getInstance("SHA-256");
            final byte[] hash = md.digest(input.getBytes(StandardCharsets.UTF_8));
            final StringBuilder sb = new StringBuilder();
            for (final byte b : hash) {
                sb.append(String.format("%02x", b));
            }
            return sb.toString();

        PrunedTag tag2 = new PrunedTag("div");
        tag2.setId("test");
        tag2.setCss("highlight");

        // Equal objects must have equal hash codes
        assertEquals(tag1.hashCode(), tag2.hashCode());

        // Hash code should be consistent
        int hash1 = tag1.hashCode();
        int hash2 = tag1.hashCode();
        assertEquals(hash1, hash2);
    }

    @Test

                                if (bitsField != null && !bitsField.getValues().isEmpty()) {
                                    docMap.put(fessConfig.getQueryCollapseInnerHitsName() + "_hash", bitsField.getValues().get(0));
                                }
                                docMap.put(fessConfig.getQueryCollapseInnerHitsName(), StreamUtil.stream(innerSearchHits.getHits())

        assertEquals(des, provider.providePrimaryInvertibleCryptographer());
        assertEquals(oneWayCryptographer, provider.providePrimaryOneWayCryptographer());
    }

    // Test with different hash algorithms
    @Test
    public void test_withSha512Cryptographer() {
        // Test with SHA512
        OneWayCryptographer sha512 = OneWayCryptographer.createSha512Cryptographer();

                }
            } 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