}

    @Test
    void testWriteSingleByte() throws IOException, CIFSException {
        // Given
        when(mockTreeHandle.isSMB2()).thenReturn(true);
        when(mockTreeHandle.getSendBufferSize()).thenReturn(65536);
        when(mockFileHandle.isValid()).thenReturn(false, true); // First false to trigger ensureOpen, then true
        when(mockFileHandle.getFileId()).thenReturn(new byte[16]);

        assertEquals(8192, config.getRdmaReadWriteThreshold(), "Default threshold should be 8KB");
        assertEquals(65536, config.getRdmaMaxSendSize(), "Default max send size should be 64KB");
        assertEquals(65536, config.getRdmaMaxReceiveSize(), "Default max receive size should be 64KB");
        assertEquals(255, config.getRdmaCredits(), "Default credits should be 255");
    }

    @Test

                    65536, // 64KB per chunk
                    196608 // 192KB total (3 * 64KB)
            );

            int bytesDecoded = response.decode(buffer, 0, buffer.length);

            assertEquals(12, bytesDecoded);
            assertEquals(3, response.getChunksWritten());
            assertEquals(65536, response.getChunkBytesWritten());

    
    // Buffer pool configuration
    private final int initialSendBuffers = 32;
    private final int initialReceiveBuffers = 64;
    private final int sendBufferSize = 65536;      // 64KB
    private final int receiveBufferSize = 65536;   // 64KB
    
    public RdmaBufferManager(RdmaProvider provider) {
        this.provider = provider;
        this.availableSendRegions = new ConcurrentLinkedQueue<>();

        serverData.smaxMpxCount = 50;
        serverData.maxBufferSize = 65536;
        serverData.sessKey = 0xABCDEF01;
        serverData.scapabilities = 0x80000000;
        serverData.securityMode = 0x0F;
        serverData.security = 1;
        serverData.maxNumberVcs = 1;
        serverData.maxRawSize = 65536;
        serverData.serverTimeZone = -300;
        serverData.encryptionKeyLength = 8;

        void testSetReadLength() {
            assertDoesNotThrow(() -> request.setReadLength(0));
            assertDoesNotThrow(() -> request.setReadLength(1024));
            assertDoesNotThrow(() -> request.setReadLength(65536));
            assertDoesNotThrow(() -> request.setReadLength(Integer.MAX_VALUE));
        }

        @Test
        @DisplayName("Should set offset correctly")
        void testSetOffset() {

        buffer.putShort((short) 50); // maxMpxCount
        buffer.putShort((short) 10); // maxNumberVcs
        buffer.putInt(8192); // maxBufferSize
        buffer.putInt(65536); // maxRawSize
        buffer.putInt(123456789); // sessionKey
        buffer.putInt(SmbConstants.CAP_UNICODE | SmbConstants.CAP_NT_SMBS); // capabilities
        buffer.putLong(new Date().getTime()); // serverTime

        when(mockConfig.getMaximumVersion()).thenReturn(DialectVersion.SMB311);
        when(mockConfig.getTransactionBufferSize()).thenReturn(65536);
        when(mockConfig.getReceiveBufferSize()).thenReturn(65536);
        when(mockConfig.getSendBufferSize()).thenReturn(65536);
        when(mockContext.getConfig()).thenReturn(mockConfig);
    }

    @Test
    @DisplayName("Should create response with configuration")

        this.fid = fid;
        this.securityInformation = securityInformation;
        this.setupCount = 0;
        this.totalDataCount = 0;
        this.maxParameterCount = 4;
        this.maxDataCount = 65536;
        this.maxSetupCount = (byte) 0x00;
    }

    @Override
    public int getPadding() {
        return 4;
    }

    @Override

    }

    @Test
    public void testGetProviderName() {
        assertEquals("TCP Fallback", provider.getProviderName());
    }

    @Test
    public void testGetMaxMessageSize() {
        assertEquals(65536, provider.getMaxMessageSize(), "TCP provider should have 64KB limit");
    }

    @Test
    public void testShutdown() {
        // Should not throw exception
        assertDoesNotThrow(() -> provider.shutdown());