@BeforeEach
    void setup() {
        // Default: do not enforce or disable SPNEGO integrity
        when(this.config.isEnforceSpnegoIntegrity()).thenReturn(false);
        when(this.config.isDisableSpnegoIntegrity()).thenReturn(false);
        this.mechs = new ASN1ObjectIdentifier[] { new ASN1ObjectIdentifier("1.2.3.4") };
    }

    private SpnegoContext newContext() {

    private void stubValidTree(long treeId, boolean connected, boolean smb2) {
        lenient().when(tree.acquire()).thenReturn(tree);
        lenient().when(tree.getTreeId()).thenReturn(treeId);
        lenient().when(tree.isConnected()).thenReturn(connected);
        lenient().when(tree.isSMB2()).thenReturn(smb2);
    }

    @Test
    @DisplayName("Constructor with null tree throws NPE (byte[] fid variant)")

            SmbResourceLocator locator = mock(SmbResourceLocator.class);
            when(parent.getLocator()).thenReturn(locator);
            // Host is empty -> triggers master browser path
            URL anyUrlWithEmptyHost = new URL("file:/");
            when(locator.getURL()).thenReturn(anyUrlWithEmptyHost);
            // Simulate failure to find master browser (UnknownHost wrapped in CIFSException)

    @Test
    @DisplayName("Test complete wire format writing")
    void testCompleteWireFormatWriting() {
        when(mockFileInfo.getFileInformationLevel()).thenReturn((byte) FileInformation.FILE_BASIC_INFO);
        when(mockFileInfo.encode(any(byte[].class), anyInt())).thenReturn(50);

        trans2SetFileInfo = new Trans2SetFileInformation(config, TEST_FID, mockFileInfo);

        byte[] setupBuffer = new byte[256];

        lenient().when(mockCifsContext.getConfig()).thenReturn(mockConfig);
        lenient().when(mockConfig.getDefaultDomain()).thenReturn("DOMAIN");
        lenient().when(mockConfig.isUseUnicode()).thenReturn(true);

        // Mock NameServiceClient for Type1Message test
        lenient().when(mockCifsContext.getNameServiceClient()).thenReturn(mockNameServiceClient);

    void setUp() {
        mockConfig = mock(Configuration.class);
        mockContext = mock(CIFSContext.class);
        when(mockContext.getConfig()).thenReturn(mockConfig);
        when(mockConfig.getMaximumBufferSize()).thenReturn(65536);
        when(mockConfig.getListSize()).thenReturn(65536);

        testFileId = new byte[16];
        for (int i = 0; i < 16; i++) {
            testFileId[i] = (byte) i;
        }
    }

        when(mockHandle.getFileId()).thenReturn(new byte[16]);

        when(mockTree.getReceiveBufferSize()).thenReturn(0x10000);
        when(mockTree.getMaximumBufferSize()).thenReturn(0x10000);
        when(mockTree.getConfig()).thenReturn(mockConfig);
        when(mockTree.isConnected()).thenReturn(true);
        when(mockTree.getTreeId()).thenReturn(1L);

        when(mockFile.getType()).thenReturn(SmbConstants.TYPE_FILESYSTEM);
    }

    void testWriteAndXWireFormatWithNonAndXCommand() {
        when(mockConfig.isUseBatching()).thenReturn(true);
        when(mockAndxCommand.getCommand()).thenReturn(0x42);
        when(mockAndxCommand.writeParameterWordsWireFormat(any(byte[].class), anyInt())).thenReturn(10);
        when(mockAndxCommand.writeBytesWireFormat(any(byte[].class), anyInt())).thenReturn(20);

        SID[] expectedMembers = new SID[] { mockSid1, mockSid2 };
        when(sidResolver.getGroupMemberSids(any(CIFSContext.class), anyString(), any(SID.class), anyInt(), anyInt()))
                .thenReturn(expectedMembers);

        SID[] result = sidResolver.getGroupMemberSids(mockContext, testServerName, mockDomainSid, 512, 0);

        assertNotNull(result);
        assertArrayEquals(expectedMembers, result);

        CustomSmbTree innerTree = mock(CustomSmbTree.class);
        ExtendedSmbTree middleTree = mock(ExtendedSmbTree.class);

        when(smbTree.unwrap(ExtendedSmbTree.class)).thenReturn(middleTree);
        when(middleTree.unwrap(CustomSmbTree.class)).thenReturn(innerTree);

        ExtendedSmbTree middle = smbTree.unwrap(ExtendedSmbTree.class);
        CustomSmbTree inner = middle.unwrap(CustomSmbTree.class);