byte[] b = new byte[] { 10, 11, 12 };
        spyTarget.send(b, 1, 2);
        verify(out).writeDirect(b, 1, 2, 1);
    }

    @Test
    @DisplayName("sendrecv with null buffers throws relevant exceptions")
    void testSendRecvInvalidInputs() throws CIFSException {
        // Null out buffer for SMB2 path -> expect NPE when building request
        when(pipe.ensureTreeConnected()).thenReturn(tree);

                    return buf;
                }, StringIndexOutOfBoundsException.class));
    }

    @ParameterizedTest(name = "{0}")
    @MethodSource("invalidBuffers")
    @DisplayName("Invalid buffers throw appropriate exceptions")
    void invalidInputsThrow(String name, Object bufferSupplierOrBytes, Class<? extends Throwable> expected) {
        // Arrange
        byte[] buf;

+ Respect the original code style: by using the same [codestyle][code-style],
  patches should only highlight the actual difference, not being disturbed by any formatting issues:
  + Only use spaces for indentation.
  + Create minimal diffs - disable on save actions like reformat source code or organize imports.
    If you feel the source code should be reformatted, create a separate PR for this change.

            assertThrows(NullPointerException.class, () -> {
                response.readDataWireFormat(null, 0, 0);
            });
        }
    }

    // Helper methods for creating test buffers

    private byte[] createValidDfsReferralBuffer() {
        // Create a buffer representing a valid DFS referral response
        // Need to include space for actual string data

            assertNotNull(hash2);
            assertEquals(64, hash2.length);
            assertNotEquals(new String(hash1), new String(hash2), "Chained hash should differ");
        }

        @Test
        @DisplayName("createEncryptionContext rejects when SMB2/3 not negotiated")
        void createEncryptionContext_rejects_noNegotiation() {

   *     control and the underlying method or constructor is inaccessible.
   * @throws IllegalArgumentException if the number of actual and formal parameters differ; if an
   *     unwrapping conversion for primitive arguments fails; or if, after possible unwrapping, a
   *     parameter value cannot be converted to the corresponding formal parameter type by a method

        lenient().when(mockDcerpcBinding.getEndpoint()).thenReturn(TEST_ENDPOINT);
        lenient().when(mockContext.getBufferCache()).thenReturn(mockBufferCache);

        // Setup buffer cache to return buffers for sendrecv operations
        lenient().when(mockBufferCache.getBuffer()).thenReturn(new byte[8192]);
    }

    /**
     * Helper method to create a DcerpcPipeHandle with injected mocks

    }

    @Test
    @DisplayName("Methods should handle null buffer without validation")
    void testMethodsWithNullBuffer() {
        // The implementation doesn't validate null buffers
        // These methods simply return 0 without accessing the buffer

        // Write methods return 0 without accessing null buffer
        assertEquals(0, response.writeSetupWireFormat(null, 0));

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     */
    int getNetbiosCachePolicy();

    /**
     * Gets the maximum buffer size for IO operations
     *
     * @return the maximum size of IO buffers, limits the maximum message size
     */
    int getMaximumBufferSize();

    /**
     *
     * Property {@code jcifs.smb.client.transaction_buf_size} (int, default 65535)
     *