assertNull(exception.getCause(), "Cause should be null for no-arg constructor");
    }

    @Test
    void testStringConstructor() {
        // Test the constructor with a message
        String message = "Connection timed out.";
        ConnectionTimeoutException exception = new ConnectionTimeoutException(message);
        assertEquals(message, exception.getMessage(), "Message should match the provided string");

    /**
     * Checks if this tree handle uses SMB2 or later protocol
     * @return whether this tree handle uses SMB2+
     */
    boolean isSMB2();

    /**
     * Gets the remote host name for this tree connection
     * @return the remote host name
     */
    String getRemoteHostName();

    /**
     * Gets the tree type (share type such as disk, printer, pipe, etc.)
     * @return the tree type
     */

import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

/**
 * Comprehensive test suite for SmbTransportPool interface.
 * Tests all transport pool operations including connection management,
 * authentication, and lifecycle operations.
 */
@ExtendWith(MockitoExtension.class)
@DisplayName("SmbTransportPool Tests")
class SmbTransportPoolTest {

    @Mock

import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Echo response message.
 *
 * This response confirms that the server is still active
 * and the connection is working properly.
 *
 * @author mbechler
 */
public class Smb2EchoResponse extends ServerMessageBlock2Response {

    /**
     * Constructs an SMB2 echo response
     * @param config the client configuration

        // Mock transport.connect() to succeed
        doNothing().when(transport).connect();

        // Simulate failed tree connect
        doThrow(new SmbException("Connection failed")).when(session).send(any(ServerMessageBlock.class), any(ServerMessageBlock.class));

        assertThrows(SmbException.class, () -> tree.treeConnect(null, null));

    int RPC_PT_CANCEL = 0x12;
    /**
     * Acknowledgment packet type
     */
    int RPC_PT_ACK = 0x13;
    /**
     * Reject packet type
     */
    int RPC_PT_REJECT = 0x14;
    /**
     * Connection-oriented cancel packet type
     */
    int RPC_PT_CO_CANCEL = 0x15;
    /**
     * Orphaned packet type
     */
    int RPC_PT_ORPHANED = 0x16;

    // RPC_C_PF_ flags (packet flags)
    /**

    /**
     * Named pipe status indicating the pipe is listening for connections.
     */
    public static final int STATUS_LISTENING = 2;

    /**
     * Named pipe status indicating the connection is established and operational.
     */
    public static final int STATUS_CONNECTION_OK = 3;

    /**
     * Named pipe status indicating the server end of the pipe is closed.
     */

 */

package jcifs.smb1.dcerpc;

import jcifs.smb1.dcerpc.ndr.NdrBuffer;
import jcifs.smb1.dcerpc.ndr.NdrException;

/**
 * DCERPC Bind message for establishing a connection context.
 * This class handles the binding of DCERPC interfaces for RPC communication.
 */
public class DcerpcBind extends DcerpcMessage {

            // Log circuit breaker rejection
            auditLogger.logSecurityViolation("Circuit breaker open for SMB connection",
                    java.util.Map.of("address", address.getHostAddress(), "port", String.valueOf(port)));
            throw new IOException("Connection rejected by circuit breaker: " + e.getMessage(), e);
        } catch (RuntimeException e) {
            // Unwrap IOException from RuntimeException

import jcifs.CIFSContext;
import jcifs.Configuration;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Echo request message.
 *
 * This command is used to test connectivity and ensure the
 * SMB2 connection is still active.
 *
 * @author mbechler
 */
public class Smb2EchoRequest extends ServerMessageBlock2Request<Smb2EchoResponse> {

    /**
     * Constructs an SMB2 echo request