}

    @Test
    @DisplayName("SMB version detection via flag or response type")
    void isSMB2_variants() throws Exception {
        // 1) smb2 flag set
        setField(transport, "smb2", true);
        assertTrue(transport.isSMB2());

        // 2) smb2 false but negotiated is SMB2 response
        setField(transport, "smb2", false);
        Smb2NegotiateResponse smb2 = new Smb2NegotiateResponse(cfg);

    protected static final short SMB2_WRITE = 0x0009;
    /** SMB2 lock file command */
    protected static final short SMB2_LOCK = 0x000A;
    /** SMB2 IO control command */
    protected static final short SMB2_IOCTL = 0x000B;
    /** SMB2 cancel command */
    protected static final short SMB2_CANCEL = 0x000C;
    /** SMB2 echo/keepalive command */
    protected static final short SMB2_ECHO = 0x000D;

        verify(tree, times(1)).close(); // try-with-resources must close
        verify(handle, never()).markClosed();
        verify(tree, never()).hasCapability(anyInt()); // not checked on SMB2
    }

    // SMB1 path: without CAP_NT_SMBS it should throw SmbUnsupportedOperationException
    @Test
    @DisplayName("watch() SMB1 without capability throws unsupported")

# SMB3 Lease Feature - Detailed Design Document

## 1. Overview

SMB3 leases provide a client caching mechanism that replaces the traditional oplock mechanism. Leases enable better performance through client-side caching while maintaining cache coherency across multiple clients.

## 2. Protocol Specification Reference

- **MS-SMB2 Section 2.2.13**: SMB2 CREATE Request with Lease Context
- **MS-SMB2 Section 2.2.14**: SMB2 CREATE Response with Lease State

import jcifs.CIFSException;
import jcifs.Configuration;
import jcifs.internal.smb1.trans.TransPeekNamedPipe;
import jcifs.internal.smb1.trans.TransPeekNamedPipeResponse;
import jcifs.internal.smb2.ioctl.Smb2IoctlRequest;
import jcifs.internal.smb2.ioctl.Smb2IoctlResponse;
import jcifs.internal.smb2.ioctl.SrvPipePeekResponse;

@ExtendWith(MockitoExtension.class)
class SmbPipeInputStreamTest {

    @Mock

import jcifs.internal.SMBSigningDigest;
import jcifs.internal.util.SMBUtil;
import jcifs.util.Crypto;

/**
 * SMB2/SMB3 message signing digest implementation.
 *
 * This class handles cryptographic signing of SMB2/SMB3 messages to ensure
 * message integrity and authenticity. It supports different signing algorithms
 * used in various SMB2/SMB3 dialect versions.
 *
 * @author mbechler
 */

    /**
     * Test pre-auth integrity with non-SMB3.1.1 should throw exception
     */
    @Test
    @DisplayName("Pre-auth integrity should fail with non-SMB3.1.1")
    void testPreauthWithNonSmb311() throws Exception {
        // Setup SMB3.0
        when(negotiateResponse.getSelectedDialect()).thenReturn(DialectVersion.SMB300);
        setPrivateField(transport, "smb2", true);

import jcifs.internal.smb1.com.SmbComBlankResponse;
import jcifs.internal.smb1.com.SmbComClose;
import jcifs.internal.smb2.create.Smb2CloseRequest;

@ExtendWith(MockitoExtension.class)
class SmbFileHandleImplTest {

    @Mock
    Configuration cfg;

    @Mock
    SmbTreeHandleImpl tree;

    private void stubValidTree(long treeId, boolean connected, boolean smb2) {

 */
package jcifs.internal.smb2.lease;

import java.nio.charset.StandardCharsets;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.internal.util.SMBUtil;
import jcifs.smb.SmbFile;

/**
 * Handles directory change notifications for SMB3 directory leasing
 */

import org.mockito.quality.Strictness;

import jcifs.Configuration;
import jcifs.SmbConstants;
import jcifs.internal.CommonServerMessageBlockResponse;
import jcifs.internal.Request;
import jcifs.internal.smb2.io.Smb2ReadRequest;
import jcifs.internal.smb2.io.Smb2ReadResponse;

@ExtendWith(MockitoExtension.class)
@MockitoSettings(strictness = Strictness.LENIENT)
class SmbFileInputStreamTest {

    @Mock
    SmbFile mockFile;

    @Mock