/**
     *
     */
    @Test
    public void testDigest() {
        final String text = "hoge";
        assertNull(MessageDigestUtil.digest("MD5", null));
        assertEquals("ea703e7aa1efda0064eaa507d9e8ab7e", MessageDigestUtil.digest("MD5", text));
        assertEquals("31f30ddbcb1bf8446576f0e64aa4c88a9f055e3c", MessageDigestUtil.digest("SHA-1", text));

        wagon.addExpectedContent(
                repos.get(0).getLayout().pathOf(artifact) + ".md5", "cd26d9e10ce691cc69aa2b90dcebbdac");
        wagon.addExpectedContent(repos.get(1).getLayout().pathOf(artifact), "expected");
        wagon.addExpectedContent(
                repos.get(1).getLayout().pathOf(artifact) + ".md5", "cd26d9e10ce691cc69aa2b90dcebbdac");

        class TransferListener extends AbstractTransferListener {

   *     </ul>
   */
  @Deprecated
  public static HashFunction md5() {
    return Md5Holder.MD5;
  }

  private static class Md5Holder {
    static final HashFunction MD5 = new MessageDigestHashFunction("MD5", "Hashing.md5()");
  }

  /**
   * Returns a hash function implementing the SHA-1 algorithm (160 hash bits).
   *

        if ("sha512".equalsIgnoreCase(digestAlgorism)) {
            oneWay = OneWayCryptographer.createSha512Cryptographer();
        } else if ("md5".equalsIgnoreCase(digestAlgorism)) {
            oneWay = new OneWayCryptographer("MD5", OneWayCryptographer.ENCODING_UTF8);
        } else {
            oneWay = OneWayCryptographer.createSha256Cryptographer();
        }

            writer.write(artifact.getId());
        }

        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(artifact.getId().getBytes());
        byte[] digest = md.digest();

        String md5path = repository.pathOf(artifact) + ".md5";
        File md5artifactFile = new File(repository.getBasedir(), md5path);
        try (Writer writer =

            .buildOrThrow();
    ImmutableSet<String> uppercaseAcronyms =
        ImmutableSet.of(
            "CH", "ID", "DNT", "DNS", "DPR", "ECT", "GPC", "HTTP2", "IP", "MD5", "P3P", "RTT", "TE",
            "UA", "UID", "URL", "WWW", "XSS");
    assertConstantNameMatchesString(HttpHeaders.class, specialCases, uppercaseAcronyms);
  }

  // Visible for other tests to use

  /** The HTTP {@code Content-Location} header field name. */
  public static final String CONTENT_LOCATION = "Content-Location";
  /** The HTTP {@code Content-MD5} header field name. */
  public static final String CONTENT_MD5 = "Content-MD5";
  /** The HTTP {@code Content-Range} header field name. */
  public static final String CONTENT_RANGE = "Content-Range";
  /**