assertDoesNotThrow(() -> {
                mockResource.setReadOnly();
                mockResource.setReadWrite();
            }, "File modification operations should not throw exception");

            verify(mockResource).setReadOnly();
            verify(mockResource).setReadWrite();
        }

        @Test
        @DisplayName("file size and space operations should return valid values")

            // Arrange
            doReturn(SmbConstants.ATTR_READONLY).when(smbFile).getAttributes();
            doNothing().when(smbFile).setAttributes(anyInt());

            // Act
            smbFile.setReadWrite();

            // Assert
            verify(smbFile).setAttributes(0);
        }
    }

    @Nested
    class WhenManipulatingFiles {

        @Mock

     * <code>setAttributes( getAttributes() &amp; ~ATTR_READONLY )</code>.
     *
     * @throws CIFSException if an error occurs modifying the resource
     */
    void setReadWrite() throws CIFSException;

    /**
     * Make this file read-only. This is shorthand for <code>setAttributes(
     * getAttributes() | ATTR_READ_ONLY )</code>.
     *