assertEquals(0, response.getChunkBytesWritten());
            assertEquals(0, response.getTotalBytesWritten());
        }

        @Test
        @DisplayName("Should handle negative values as unsigned")
        void testDecodeNegativeValuesAsUnsigned() throws SMBProtocolDecodingException {
            byte[] buffer = new byte[12];
            SMBUtil.writeInt4(-1, buffer, 0); // chunksWritten

	[op(0x01)]
	int SamrCloseHandle([in] policy_handle *handle);

	[op(0x39)]
	int SamrConnect2([in,string,unique] wchar_t *system_name,
			[in] uint32_t access_mask,
			[out] policy_handle *handle);

	[op(0x3e)]
	int SamrConnect4([in,string,unique] wchar_t *system_name,
			[in] uint32_t unknown,
			[in] uint32_t access_mask,
			[out] policy_handle *handle);

	[op(0x07)]
	int SamrOpenDomain([in] policy_handle *handle,

import jcifs.internal.smb2.create.CreateContextRequest;
import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Durable Handle Request Create Context (DHnQ)
 *
 * MS-SMB2 Section 2.2.13.2.3
 */
public class DurableHandleRequest implements CreateContextRequest {

    /**
     * Context name for durable handle request
     */
    public static final String CONTEXT_NAME = "DHnQ";

        // Then
        assertNotNull(signingKey, "Should handle empty session key");
        assertEquals(16, signingKey.length, "Should still produce 16-byte key");
    }

    @Test
    @DisplayName("Should handle null preauth integrity for SMB 3.0.0")
    void testDeriveKeys_NullPreauthForSMB300() {
        // Given

            configField.setAccessible(true);
            assertEquals(mockConfig, configField.get(request));
        }

        @Test
        @DisplayName("Should handle null configuration")
        void testConstructorWithNullConfig() {
            assertDoesNotThrow(() -> {
                Smb2EchoRequest request = new Smb2EchoRequest(null);
                assertNotNull(request);

     * @throws SmbException
     */
    synchronized SmbFileHandleImpl ensureOpen() throws CIFSException {
        if (this.handle == null || !this.handle.isValid()) {
            // one extra acquire to keep this open till the stream is released
            if (this.file instanceof SmbNamedPipe) {
                this.handle = this.file.openUnshared(SmbConstants.O_EXCL, ((SmbNamedPipe) this.file).getPipeType() & 0xFF0000, this.sharing,

// unless that metadata is needed in order to allow a subsequent data retrieval
// to  be  correctly  handled.   For example, changes to st_atime or st_mtime
// (respectively, time of last access and time of last modification; see inode(7))
// do not require flushing because they are not necessary for a subsequent data
// read to be handled correctly. On the other hand, a change to the file size

        // Then
        assertNotNull(exception);
        assertEquals(message, exception.getMessage());
        assertEquals(cause, exception.getCause());
    }

    @Test
    @DisplayName("Should handle null message gracefully")
    void testNullMessage() {
        // When/Then
        assertDoesNotThrow(() -> {
            RuntimeCIFSException exception = new RuntimeCIFSException((String) null);

    }

    @Test
    @DisplayName("Constructor with null request should work")
    void testConstructorWithNullRequest() {
        // Test that null request is handled properly
        SmbNegotiation negotiationWithNullRequest = new SmbNegotiation(null, mockResponse, testRequestBuffer, testResponseBuffer);

        assertNull(negotiationWithNullRequest.getRequest());

        assertEquals(0xDE, buffer[1] & 0xFF);
        assertEquals(0xBC, buffer[2] & 0xFF);
        assertEquals(0x9A, buffer[3] & 0xFF);
    }

    @Test
    @DisplayName("Should handle big endian encoding/decoding")
    void testBigEndianOperations() {
        // Given
        int value = 0x12345678;
        byte[] buffer = new byte[4];

        // When - encode big endian