// Assert
        assertTrue(conn instanceof SmbFile);
        SmbFile file = (SmbFile) conn;
        assertNotNull(file.getContext(), "Context must be non-null");
        assertSame(SingletonContext.getInstance(), file.getContext(), "Should use SingletonContext when none provided");
    }

    @Test
    @DisplayName("parseURL: exact 'smb://' sets default port")

  public <T extends B> @Nullable T putInstance(
      Class<@NonNull T> type, @ParametricNullness T value) {
    return cast(type, put(type, value));
  }

  @Override
  public <T extends @NonNull B> @Nullable T getInstance(Class<T> type) {
    return cast(type, get(type));
  }

  @CanIgnoreReturnValue
  private static <T> @Nullable T cast(Class<T> type, @Nullable Object value) {
    return Primitives.wrap(type).cast(value);
  }

     * @throws NoSuchAlgorithmException if the algorithm is not available
     */
    @Test
    void testDecryptDes() throws GeneralSecurityException, NoSuchAlgorithmException {
        KeyGenerator keyGen = KeyGenerator.getInstance("DES");
        keyGen.init(56);
        SecretKey secretKey = keyGen.generateKey();
        Key key = new KerberosKey(null, secretKey.getEncoded(), KerberosConstants.DES_ENC_TYPE, 0);

    private static final FileConfigDbm _instance = new FileConfigDbm();

    private FileConfigDbm() {
    }

    public static FileConfigDbm getInstance() {
        return _instance;
    }

    // ===================================================================================
    //                                                                       Current DBDef

        try (Writer writer = new OutputStreamWriter(new FileOutputStream(artifactFile), StandardCharsets.ISO_8859_1)) {
            writer.write(artifact.getId());
        }

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

        String md5path = repository.pathOf(artifact) + ".md5";

    private static final AccessTokenDbm _instance = new AccessTokenDbm();

    private AccessTokenDbm() {
    }

    public static AccessTokenDbm getInstance() {
        return _instance;
    }

    // ===================================================================================
    //                                                                       Current DBDef

  @Override
  protected Map<Class<? extends B>, B> delegate() {
    return delegate;
  }

  @Override
  @SuppressWarnings("unchecked") // value could not get in if not a T
  public <T extends B> @Nullable T getInstance(Class<T> type) {
    return (T) delegate.get(checkNotNull(type));
  }

  /**
   * Guaranteed to throw an exception and leave the map unmodified.
   *
   * @throws UnsupportedOperationException always

    void setUp() {
        dfs = new Dfs();
        testDfs = new TestDfs();

        // Mock static methods
        logStreamMockedStatic = mockStatic(LogStream.class);
        lenient().when(LogStream.getInstance()).thenReturn(mock(LogStream.class));

        uniAddressMockedStatic = mockStatic(UniAddress.class);
        smbTransportMockedStatic = mockStatic(SmbTransport.class);

    }

    @Override
    public String asEsSearchType() {
        return "crawling_info";
    }

    @Override
    public CrawlingInfoDbm asDBMeta() {
        return CrawlingInfoDbm.getInstance();
    }

    @Override
    protected <RESULT extends CrawlingInfo> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {

    }

    @Override
    public String asEsSearchType() {
        return "elevate_word";
    }

    @Override
    public ElevateWordDbm asDBMeta() {
        return ElevateWordDbm.getInstance();
    }

    @Override
    protected <RESULT extends ElevateWord> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {