when(mockTreeHandle.send(any(SmbComCreateDirectory.class), any(SmbComBlankResponse.class)))
                    .thenReturn(mock(SmbComBlankResponse.class));

            // Act
            smbFile.mkdir();

            // Assert
            verify(mockTreeHandle).send(any(SmbComCreateDirectory.class), any(SmbComBlankResponse.class));
        }

        @Test

        ArgumentCaptor<SmbComBlankResponse> respCap = ArgumentCaptor.forClass(SmbComBlankResponse.class);
        verify(tree, times(1)).send(reqCap.capture(), respCap.capture(), eq(RequestParam.NO_RETRY));
        assertTrue(reqCap.getValue() instanceof SmbComClose, "Expected SmbComClose request");
        assertNotNull(respCap.getValue(), "Expected SmbComBlankResponse");

        verify(tree, times(1)).release();
    }

import jcifs.internal.RequestWithPath;
import jcifs.internal.SmbNegotiationResponse;
import jcifs.internal.TreeConnectResponse;
import jcifs.internal.smb1.ServerMessageBlock;
import jcifs.internal.smb1.com.SmbComBlankResponse;
import jcifs.internal.smb1.com.SmbComNegotiateResponse;
import jcifs.internal.smb1.com.SmbComTreeConnectAndX;
import jcifs.internal.smb1.com.SmbComTreeConnectAndXResponse;

    int localPort;
    UniAddress address;
    Socket socket;
    int port, mid;
    OutputStream out;
    InputStream in;
    byte[] sbuf = new byte[512]; /* small local buffer */
    SmbComBlankResponse key = new SmbComBlankResponse();
    long sessionExpiration = System.currentTimeMillis() + SO_TIMEOUT;
    LinkedList referrals = new LinkedList();
    SigningDigest digest = null;
    LinkedList sessions = new LinkedList();