try {
            conn.connect();
            fail("Should throw IOException when endpoint is not set");
        } catch (IOException e) {
            assertTrue(e.getMessage().contains("endpoint is blank"));
        }
    }

    /**
     * Test thread-safety of connect() method.
     * Multiple threads should be able to call connect() concurrently without issues.
     */

            }
            ThreadUtil.sleep(200L);
        }
        if (!connected) {
            throw new IllegalStateException("Could not connect to the Samba server");
        }
    }

    @Override
    protected void tearDown() throws Exception {
        if (sambaServer != null) {
            sambaServer.stop();
        }
        super.tearDown();
    }

  /**
   * Returns true if the edges in this graph are directed. Directed edges connect a {@link
   * EndpointPair#source() source node} to a {@link EndpointPair#target() target node}, while
   * undirected edges connect a pair of nodes to each other.
   */
  @Override
  boolean isDirected();

  /**
   * Returns true if this graph allows self-loops (edges that connect a node to itself). Attempting

        setTree(c, tree);

        SmbResourceLocatorImpl loc = new SmbResourceLocatorImpl(ctx, smbUrl("smb://host/share/"));
        SmbTreeHandle h = c.connect(loc);
        assertNotNull(h);
        // No host connect attempted as we're already connected
        verify(c, never()).connectHost(any(), anyString());
    }

    @Test
    @DisplayName("getSession returns null when no tree is present")

    /**
     * Connect the transport
     *
     * @param timeout the maximum time to wait for the connection in milliseconds
     * @return whether the transport was connected
     * @throws TransportException if the connection fails
     */
    public synchronized boolean connect(final long timeout) throws TransportException {
        int st = this.state;
        try {

            this.handle.decode(_src);
            this.retval = _src.dec_ndr_long();
        }
    }

    /**
     * SAMR Connect4 operation for establishing a connection to the SAM database.
     * This is an enhanced version of Connect2 with additional parameters.
     */
    public static class SamrConnect4 extends DcerpcMessage {

        @Override
        public int getOpnum() {

            handle.decode(_src);
            retval = _src.dec_ndr_long();
        }
    }

    /**
     * SAMR Connect4 operation for establishing a connection to the SAM database.
     * This is an enhanced version of Connect2 with additional parameters.
     */
    public static class SamrConnect4 extends DcerpcMessage {

        @Override
        public int getOpnum() {

   *
   * <p>If {@code edge} already connects an endpoint pair equal to {@code endpoints}, then this
   * method will have no effect.
   *
   * @return {@code true} if the network was modified as a result of this call
   * @throws IllegalArgumentException if {@code edge} already exists in the graph and connects some
   *     other endpoint pair that is not equal to {@code endpoints}

    /**
     * Constructs an unconnected NbtSocket.
     */
    public NbtSocket() {
    }

    /**
     * Constructs an NbtSocket and connects it to the specified NetBIOS address and port.
     *
     * @param address the NetBIOS address to connect to
     * @param port the port number, or 0 for the default NetBIOS session service port
     * @throws IOException if an I/O error occurs while creating the socket
     */

    }

    /**
     * Test: Verify connected flag is set correctly
     */
    @Test
    public void testConnectedFlag() {
        assertFalse("Initially not connected", fesenClient.connected());

        // After destroy, should be disconnected
        fesenClient.destroy();
        assertFalse("Should be disconnected after destroy", fesenClient.connected());
    }