when(mockResource.length()).thenReturn(expectedLength);
            when(mockResource.getDiskFreeSpace()).thenReturn(expectedFreeSpace);

            // When
            long length = mockResource.length();
            long freeSpace = mockResource.getDiskFreeSpace();

            // Then
            assertEquals(expectedLength, length, "Should return correct file length");

     *
     * @return the free disk space in bytes of the drive on which this file or
     *         directory resides
     * @throws CIFSException if an error occurs accessing the resource
     */
    long getDiskFreeSpace() throws CIFSException;

    /**
     * Returns the length of this <code>SmbResource</code> in bytes. If this object
     * is a <code>TYPE_SHARE</code> the total capacity of the disk shared in