return 0;
    }

    @Override
    protected int readDataWireFormat(final byte[] buffer, final int bufferIndex, final int len) throws SMBProtocolDecodingException {
        if (len > this.outputBuffer.length) {
            throw new SMBProtocolDecodingException("Payload exceeds buffer size");
        }
        System.arraycopy(buffer, bufferIndex, this.outputBuffer, 0, len);
        return len;

    }

        final int start = bufferIndex;
        final int structureSize = SMBUtil.readInt2(buffer, bufferIndex);
        if (structureSize == 9) {
            return super.readErrorResponse(buffer, bufferIndex);
        }
        if (structureSize != 49) {
            throw new SMBProtocolDecodingException("Expected structureSize = 49");
        }

            assertThrows(SMBProtocolDecodingException.class, () -> {
                testBlock.decode(buffer, 0);
            });
        }

        @Test
        @DisplayName("Test decode with retain payload")
        void testDecodeWithRetainPayload() throws SMBProtocolDecodingException {
            testBlock.retainPayload();

    }

    /**
     * {@inheritDoc}
     *
     * @throws SMBProtocolDecodingException if there is an error decoding the response
     *
     * @see jcifs.internal.smb2.ServerMessageBlock2#haveResponse(byte[], int, int)
     */
    @Override
    protected void haveResponse(final byte[] buffer, final int start, final int len) throws SMBProtocolDecodingException {
        if (isRetainPayload()) {

        SMBUtil.writeInt2(10, buffer, bufferIndex);

        SMBProtocolDecodingException exception =
                assertThrows(SMBProtocolDecodingException.class, () -> response.readBytesWireFormat(buffer, bufferIndex),
                        "Should throw SMBProtocolDecodingException for invalid structure size");

        assertEquals("Expected structureSize = 9", exception.getMessage());
    }

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;

import jcifs.Configuration;
import jcifs.config.PropertyConfiguration;
import jcifs.internal.SMBProtocolDecodingException;
import jcifs.internal.smb2.nego.CompressionNegotiateContext;

/**
 * Comprehensive tests for SMB3 compression negotiate context.
 */
public class CompressionNegotiateContextTest {

import org.mockito.Mock;

import jcifs.internal.SMBProtocolDecodingException;

/**
 * Test class for Decodable interface functionality
 */
@DisplayName("Decodable Interface Tests")
class DecodableTest extends BaseTest {

    @Mock
    private Decodable mockDecodable;

    @Test
    @DisplayName("Should define decode method")
    void testDecodeMethod() throws SMBProtocolDecodingException {
        // Given

    void testReadBytesWireFormat() throws SMBProtocolDecodingException {
        byte[] buffer = new byte[10];
        assertEquals(0, response.readBytesWireFormat(buffer, 0), "Should read 0 bytes");
    }

    @Test
    @DisplayName("readBytesWireFormat with null buffer - returns zero")
    void testReadBytesWireFormatNullBuffer() throws SMBProtocolDecodingException {

     * @param bufferIndex the starting index in the buffer
     * @return message length
     * @throws SMBProtocolDecodingException if decoding fails
     */
    int decode(byte[] buffer, int bufferIndex) throws SMBProtocolDecodingException;

    /**
     * Encodes this message into a byte array.
     *
     * @param dst the destination byte array

        int bufferIndex = 0;

        // Write invalid structure size
        SMBUtil.writeInt2(structureSize, buffer, bufferIndex);

        // When & Then
        SMBProtocolDecodingException exception =
                assertThrows(SMBProtocolDecodingException.class, () -> response.readBytesWireFormat(buffer, bufferIndex));
        assertEquals("Expected structureSize = 17", exception.getMessage());
    }

    @Test