// Mock the actual mkdir call
            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