verify(request, times(1)).createCancel();
    }

    @Test
    @DisplayName("Test createCancel returns null when cancel not supported")
    void testCreateCancelReturnsNull() {
        // Given
        when(request.createCancel()).thenReturn(null);

        // When
        CommonServerMessageBlockRequest result = request.createCancel();

        // Then
        assertNull(result);

        assertNotNull(notifyTransaction);
    }

    @Test
    @DisplayName("Test createCancel method returns SmbComNtCancel")
    void testCreateCancel() {
        // Set a MID for the transaction
        transaction.setMid(12345);

        // Create cancel request
        CommonServerMessageBlockRequest cancelRequest = transaction.createCancel();

        // Verify it returns an SmbComNtCancel instance

        when(request.getNext()).thenReturn(nextRequest);
        when(request.split()).thenReturn(nextRequest);
        when(request.allowChain(nextRequest)).thenReturn(true);
        when(request.createCancel()).thenReturn(nextRequest);
        when(request.size()).thenReturn(1024);
        when(request.getOverrideTimeout()).thenReturn(5000);

        // When & Then
        assertTrue(request.isResponseAsync());

    }

    @Test
    @DisplayName("Test createCancel returns null")
    void testCreateCancel() {
        // Given
        Smb2CancelRequest request = new Smb2CancelRequest(mockConfig, 1L, 0L);

        // When
        CommonServerMessageBlockRequest cancelRequest = request.createCancel();

        // Then

        @Test
        @DisplayName("createCancel should return Smb2CancelRequest with same mid and asyncId")
        void testCreateCancel() {
            long mid = 123L;
            long asyncId = 456L;
            testRequest.setMid(mid);
            testRequest.setAsyncId(asyncId);

            CommonServerMessageBlockRequest cancelRequest = testRequest.createCancel();

            assertNotNull(cancelRequest);

            assertNull(testBlock.getNext());
            assertFalse(testBlock.allowChain(mock(CommonServerMessageBlockRequest.class)));
            assertNull(testBlock.split());
            assertNull(testBlock.createCancel());
            assertNull(testBlock.getNextResponse());
            assertFalse(testBlock.isCancel());
            assertEquals(1, testBlock.getCreditCost());
            assertEquals(1, testBlock.getGrantedCredits());

        return null;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.CommonServerMessageBlockRequest#createCancel()
     */
    @Override
    public CommonServerMessageBlockRequest createCancel() {
        return null;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.internal.CommonServerMessageBlockResponse#getNextResponse()
     */