@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);

        verify(transport).hasCapability(42);
    }

    // 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());

     * @throws IOException if an I/O error occurs
     */
    protected abstract void doSkip(Long key) throws IOException;

    /**
     * Checks if the transport is disconnected.
     *
     * @return whether the transport is disconnected
     */
    public boolean isDisconnected() {
        return this.state == 4 || this.state == 5 || this.state == 6 || this.state == 0;
    }

    /**

            assertTrue(
                    initialState == RdmaConnection.RdmaConnectionState.DISCONNECTED
                            || initialState == RdmaConnection.RdmaConnectionState.CONNECTING,
                    "Initial state should be DISCONNECTED or CONNECTING");

            // Test connection properties
            // Note: Local address may be null for TCP fallback provider

                    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");
                        }
                    }

        // Note: Real SmbTransportImpl will report as disconnected without actual socket
        SmbTransportImpl second = testPool.getSmbTransport(ctx, address, 445, false);

        // Then: Will create new connection since real transport has no socket
        assertNotSame(first, second, "Should create new connection when first is disconnected");
    }

    @Test

        assertThrows(SmbException.class, () -> tree.treeConnect(null, null));
        // After failure, state should be reset to disconnected
        assertEquals(0, tree.connectionState);
    }

    @Test
    void testSend() throws SmbException {
        SmbTree tree = new SmbTree(session, "testShare", "A:");

import jcifs.util.transport.TransportException;

/**
 * This class encapsulates the logic for switching tree connections
 *
 * Switching trees can occur either when the tree has been disconnected by failure or idle-timeout - as well as on
 * DFS referrals.
 *
 * @author mbechler
 *
 */
class SmbTreeConnection implements AutoCloseable {

        this.channelId = channelId;
        this.transport = transport;
        this.localInterface = localInterface;
        this.remoteInterface = remoteInterface;
        this.state = ChannelState.DISCONNECTED;
        this.establishedTime = System.currentTimeMillis();
        this.lastActivityTime = establishedTime;

        this.bytesSent = new AtomicLong();
        this.bytesReceived = new AtomicLong();

    protected volatile RdmaConnectionState state;
    protected RdmaCredits credits;
    protected int maxFragmentedSize;
    protected int maxReadWriteSize;
    
    public enum RdmaConnectionState {
        DISCONNECTED,
        CONNECTING,
        CONNECTED,
        ESTABLISHED,
        ERROR,
        CLOSING,
        CLOSED
    }
    
    public RdmaConnection(InetSocketAddress remote, InetSocketAddress local) {