transport.setState(state);
                assertTrue(transport.isDisconnected(), "State " + state + " should be disconnected");
            }

            for (int state : connectedStates) {
                transport.setState(state);
                assertFalse(transport.isDisconnected(), "State " + state + " should not be disconnected");
            }
        }

        @Test

    @DisplayName("available() on SMB1 returns 0 and marks closed on disconnected statuses")
    void available_smb1_disconnectedStatuses(int status) throws Exception {
        // Verify SMB1 path: disconnected/server-closed statuses yield 0 and mark fd closed
        SmbPipeInputStream stream = newStreamWithInit(false);

        }
    }

    /**
     * Disconnect the transport
     *
     * @param hard if true, disconnect immediately without waiting for outstanding requests
     * @return whether connection was in use
     * @throws IOException if an I/O error occurs during disconnection
     */
    public synchronized boolean disconnect(final boolean hard) throws IOException {
        return disconnect(hard, true);
    }

    /**

     */
    boolean hasCapability(int cap) throws SmbException;

    /**
     * Checks if the transport has been disconnected.
     *
     * @return whether the transport has been disconnected
     */
    boolean isDisconnected();

    /**
     * Disconnects the transport from the remote server.
     *
     * @param hard if true, force immediate disconnection

    }

    // Edge: disconnected status toggles
    @ParameterizedTest
    @DisplayName("isDisconnected reflects current mocked state")
    @ValueSource(booleans = { true, false })
    void isDisconnected_states(boolean disconnected) {
        when(transport.isDisconnected()).thenReturn(disconnected);
        assertEquals(disconnected, transport.isDisconnected());
        verify(transport, times(1)).isDisconnected();

import java.util.NoSuchElementException;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * A set comprising zero or more {@linkplain Range#isEmpty nonempty}, {@linkplain
 * Range#isConnected(Range) disconnected} ranges of type {@code C}.
 *
 * <p>Implementations that choose to support the {@link #add(Range)} operation are required to
 * ignore empty ranges and coalesce connected ranges. For example:
 *
 * {@snippet :

import java.util.NoSuchElementException;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**
 * A set comprising zero or more {@linkplain Range#isEmpty nonempty}, {@linkplain
 * Range#isConnected(Range) disconnected} ranges of type {@code C}.
 *
 * <p>Implementations that choose to support the {@link #add(Range)} operation are required to
 * ignore empty ranges and coalesce connected ranges. For example:
 *
 * {@snippet :

import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Tree Disconnect response message.
 *
 * This response confirms that the tree connection
 * has been successfully disconnected.
 *
 * @author mbechler
 */
public class Smb2TreeDisconnectResponse extends ServerMessageBlock2Response {

    /**
     * Creates a new SMB2 tree disconnect response.
     *
     * @param config the CIFS configuration
     */

import (
	"context"
	"net"
	"time"
)

// CheckPortAvailability - check if given host and port is already in use.
// Note: The check method tries to listen on given port and closes it.
// It is possible to have a disconnected client in this tiny window of time.
func CheckPortAvailability(host, port string, opts TCPOptions) (err error) {
	lc := &net.ListenConfig{}

	ctx, cancel := context.WithTimeout(context.Background(), time.Second)

                    if ((inUse ? l != 1 : l > 0)) {
                        log.warn("Disconnected tree while still in use " + this);
                        dumpResource();
                        wasInUse = true;
                        if (sess.getConfig().isTraceResourceUsage()) {
                            throw new RuntimeCIFSException("Disconnected tree while still in use");
                        }
                    }