// 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);

import jcifs.smb1.dcerpc.rpc;

/**
 * MS-RPC SAMR close handle operation.
 *
 * This class implements the SAMR CloseHandle operation for releasing
 * Security Account Manager (SAM) handles.
 */
public class MsrpcSamrCloseHandle extends samr.SamrCloseHandle {

    /**
     * Creates a new request to close a SAM handle.
     *
     * @param policyHandle the policy handle to close
     */

        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

            byte[] buffer = new byte[1024];
            int result = echoResponse.writeBytesWireFormat(buffer, 0);
            assertEquals(0, result);
        }

        @Test
        @DisplayName("Should handle different buffer positions")
        void testWriteBytesWireFormatDifferentPositions() {
            byte[] buffer = new byte[1024];

            assertEquals(0, echoResponse.writeBytesWireFormat(buffer, 0));

            NtStatus.NT_STATUS_SHARING_VIOLATION, NtStatus.NT_STATUS_INVALID_PARAMETER })
    @DisplayName("Should handle various NT status codes")
    void testVariousNTStatusCodes(int ntStatus) {
        // When
        SmbException exception = new SmbException(ntStatus, false);

        // Then
        assertNotNull(exception);

            // Lease completely broken - invalidate cache
            entry.invalidate();
        }

        if ((newState & Smb2LeaseState.SMB2_LEASE_HANDLE_CACHING) == 0) {
            // Lost handle cache - may need to close directory handle
            changeNotifier.stopWatching(directoryPath);
        }

        // Forward to base lease manager
        baseLeaseManager.handleLeaseBreak(leaseKey, newState);
    }

        default:
            return "Check resource availability and retry";
        }
    }

    /**
     * Static factory for file handle exhaustion
     */
    public static SmbResourceException fileHandleExhausted(int errorCode) {
        return new SmbResourceException("File handle limit exceeded", errorCode, ResourceType.FILE_HANDLE);
    }

    /**
     * Static factory for connection pool exhaustion
     */

            }
        }
        return false;
    }

    /**
     * Add a durable handle V1 context to this request
     */
    public void addDurableHandleV1Context() {
        addCreateContext(new jcifs.internal.smb2.persistent.DurableHandleRequest());
    }

    /**
     * Add a durable handle V2 context to this request
     * @param timeoutMs the timeout in milliseconds (0 for persistent handles)

    }

    /**
     * Sets the context handle for the async notify request.
     *
     * @param contextHandle the context handle from registration
     */
    public void setContextHandle(byte[] contextHandle) {
        this.contextHandle = contextHandle != null ? contextHandle.clone() : null;
    }

    /**
     * Gets the context handle.
     *
     * @return the context handle
     */
    public byte[] getContextHandle() {

        void testConstructorAndOpnum() {
            // When: Creating close handle message
            samr.SamrCloseHandle message = new samr.SamrCloseHandle(mockPolicyHandle);

            // Then: Should have correct opnum and handle
            assertEquals(0x01, message.getOpnum());
            assertEquals(mockPolicyHandle, message.handle);
        }

        @Test