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")

        // Test setting attributes
        file.setReadOnly();
        assertFalse(file.canWrite(), "Should not be writable when read-only");

        file.setReadWrite();
        assertTrue(file.canWrite(), "Should be writable after setReadWrite");
    }

    @Test
    void testFileOverwriteWithDifferentContent() throws Exception {
        long timestamp = System.currentTimeMillis();

            // 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>.
     *

            attrExpiration = System.currentTimeMillis() + attrExpirationPeriod;
            isExists = true;
        }

        if ((attributes & ATTR_READONLY) != 0) {
            setReadWrite();
        }

        /*
         * Delete or Delete Directory Request / Response
         */

        if (LogStream.level >= 3) {
            log.println("delete: " + fileName);
        }

            if (!exists()) {
                throw new SmbException(NtStatus.NT_STATUS_OBJECT_NAME_NOT_FOUND, null);
            }

            if ((this.attributes & ATTR_READONLY) != 0) {
                setReadWrite();
            }

            /*
             * Delete or Delete Directory Request / Response
             */

            if (log.isDebugEnabled()) {