void testToStringWithValidData() {
            byte[] challenge = new byte[] { (byte) 0x01, (byte) 0x02, (byte) 0x03, (byte) 0xFF };
            UniAddress dc = mock(UniAddress.class);
            when(dc.toString()).thenReturn("SERVER123");

            NtlmChallenge nc = new NtlmChallenge(challenge, dc);
            String result = nc.toString();

            // The format is: NtlmChallenge[challenge=0x<hex>,dc=<dc_string>]

        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);

        when(handle.isValid()).thenReturn(true);
        when(handle.getTree()).thenReturn(tree);
        when(tree.isSMB2()).thenReturn(true);
        when(tree.getConfig()).thenReturn(mock(Configuration.class));
        when(handle.getFileId()).thenReturn(fileId);
        when(tree.send(any(CommonServerMessageBlockRequest.class), any(), any(), any())).thenReturn(resp);
    }

        lenient().when(tree.acquire()).thenReturn(tree);
        lenient().when(tree.getConfig()).thenReturn(config);
        lenient().when(config.getListCount()).thenReturn(10);
        lenient().when(config.getListSize()).thenReturn(4096);

        lenient().when(parent.getLocator()).thenReturn(locator);
        lenient().when(locator.getUNCPath()).thenReturn("\\\\SERVER\\Share\\dir\\"); // ends with \\

    @ParameterizedTest
    @DisplayName("isInUse reflects current mocked state")
    @ValueSource(booleans = { true, false })
    void isInUse_variants(boolean inUse) {
        when(session.isInUse()).thenReturn(inUse);

        boolean result = session.isInUse();

        assertEquals(inUse, result);
        verify(session, times(1)).isInUse();
    }

        when(ctx.getConfig()).thenReturn(config);
        when(config.getCapabilities()).thenReturn(0);
        when(config.getFlags2()).thenReturn(0);
        when(config.getMaxMpxCount()).thenReturn(1);
        when(config.getSendBufferSize()).thenReturn(4096);
        when(config.getReceiveBufferSize()).thenReturn(4096);
        when(config.getTransactionBufferSize()).thenReturn(4096);

        void testFromReferralWithSpecialName() {
            when(mockReferral.getTtl()).thenReturn(300);
            when(mockReferral.getRFlags()).thenReturn(Trans2GetDfsReferralResponse.FLAGS_NAME_LIST_REFERRAL);
            when(mockReferral.getExpandedNames()).thenReturn(new String[0]);
            when(mockReferral.getSpecialName()).thenReturn("\\SPECIAL");

            String reqPath = "\\\\domain\\root";

        // Setup required for this test
        when(parent.getLocator()).thenReturn(locator);
        when(locator.getUNCPath()).thenReturn("\\\\server\\share\\dir\\");
        when(tree.getConfig()).thenReturn(config);
        when(config.getMaximumBufferSize()).thenReturn(65535);
        when(config.getListSize()).thenReturn(65535);

        // Arrange: initial page with two entries, then one more entry, then no more files

        when(mockFile2.getName()).thenReturn("subfolder");
        when(mockFile2.length()).thenReturn(0L);
        when(mockFile2.lastModified()).thenReturn(System.currentTimeMillis() - 1800000);
        when(mockFile2.isDirectory()).thenReturn(true);
        when(mockFile2.getAttributes()).thenReturn(0x10); // FILE_ATTRIBUTE_DIRECTORY

        FileEntry entry3 = mock(FileEntry.class);

        when(delegate.hasNext()).thenReturn(true, true, true, false);
        when(delegate.next()).thenReturn(entry1, entry2, entry3);

        // First rejected, second throws exception, third accepted
        when(filter.accept(resource)).thenReturn(false).thenThrow(new CIFSException("Error")).thenReturn(true);

        TestIterator iterator = new TestIterator(filter);