when(mockBufferCache.getBuffer()).thenReturn(expectedBuffer);

        // When
        byte[] buffer = mockBufferCache.getBuffer();

        // Then
        assertNotNull(buffer, "getBuffer should never return null");
        assertSame(expectedBuffer, buffer, "Should return configured buffer");
    }

    @Test
    @DisplayName("releaseBuffer should accept byte arrays gracefully")

        SessionRetargetResponsePacket packet = new SessionRetargetResponsePacket();

        // Create a buffer large enough to hold the read bytes
        byte[] buffer = new byte[6];
        int bytesRead = packet.readTrailerWireFormat(bais, buffer, 0);

        // Verify that 6 bytes were read, which is the expected length.
        assertEquals(6, bytesRead);
    }

    @Test

        assertEquals((byte) 0xEF, buffer[0]); // Little-endian
        assertEquals((byte) 0xCD, buffer[1]);
        assertEquals((byte) 0xAB, buffer[2]);
        assertEquals((byte) 0x89, buffer[3]);
        assertEquals((byte) 0x67, buffer[4]);
        assertEquals((byte) 0x45, buffer[5]);
        assertEquals((byte) 0x23, buffer[6]);
        assertEquals((byte) 0x01, buffer[7]);

        ndrBuffer.setIndex(0);

        byte[] buffer = new byte[8];
        int bufferIndex = 0;

        SMBUtil.writeInt2(status, buffer, bufferIndex);
        bufferIndex += 2;
        SMBUtil.writeInt2(0, buffer, bufferIndex);
        bufferIndex += 2;
        SMBUtil.writeInt2(0, buffer, bufferIndex);
        bufferIndex += 2;
        SMBUtil.writeInt2(0, buffer, bufferIndex);

            e.name = readString(buffer, bufferIndex, 16, false);
            bufferIndex += 16;
            e.versionMajor = buffer[bufferIndex] & 0xFF;
            bufferIndex++;
            e.versionMinor = buffer[bufferIndex++] & 0xFF;
            e.type = readInt4(buffer, bufferIndex);
            bufferIndex += 4;
            int off = readInt4(buffer, bufferIndex);
            bufferIndex += 4;

            int bytesWritten = context.encode(buffer, 0);

            assertEquals(12, bytesWritten);
            assertEquals(3, SMBUtil.readInt2(buffer, 0));
            assertEquals(2, SMBUtil.readInt2(buffer, 2));
            assertEquals(0x01, SMBUtil.readInt2(buffer, 4));
            assertEquals(0x02, SMBUtil.readInt2(buffer, 6));
            assertEquals(0x03, SMBUtil.readInt2(buffer, 8));

        return 0;
    }

    @Override
    protected int readParametersWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        return 0;
    }

    @Override
    protected int readDataWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        return 0;
    }

    @Override
    public String toString() {

     */
    public byte[] getKey() {
        return Arrays.copyOf(key, LEASE_KEY_SIZE);
    }

    /**
     * Write the lease key to a buffer
     *
     * @param dst destination buffer
     * @param dstIndex starting index in destination buffer
     */
    public void encode(byte[] dst, int dstIndex) {
        System.arraycopy(key, 0, dst, dstIndex, LEASE_KEY_SIZE);
    }

    /**

            assertEquals(0, echoResponse.writeBytesWireFormat(buffer, 100));
            assertEquals(0, echoResponse.writeBytesWireFormat(buffer, 500));
        }

        @Test
        @DisplayName("Should not modify buffer")
        void testWriteBytesWireFormatNoModification() {
            byte[] buffer = new byte[1024];
            byte[] originalBuffer = buffer.clone();

        this.maxDataCount = maxDataCount;
    }

    /**
     * Sets the transaction buffer
     * @param buffer
     *            the transaction buffer to use
     */
    public void setBuffer(final byte[] buffer) {
        this.txn_buf = buffer;
    }

    /**
     * Releases and returns the transaction buffer
     * @return the txn_buf
     */
    public byte[] releaseBuffer() {