def METHOD_NAME(n_bytes, mkfs_cmd):
    """Test FileUtilities.wipe_path"""
    filename = create_disk_image(n_bytes)
    print('created disk image %s' % filename)
    # format filesystem
    format_filesystem(filename, mkfs_cmd)
    # mount
    mountpoint = tempfile.mkdtemp(prefix='bleachbit-wipe-mountpoint')
    mount_filesystem(filename, mountpoint)
    # baseline free disk space
    print('df for clean filesystem')
    print(run_external(['df', mountpoint])[1])
    # make dirty
    make_dirty(mountpoint)
    # verify dirtiness
    unmount_filesystem(mountpoint)
    assert(verify_cleanliness(filename) == 11)
    mount_filesystem(filename, mountpoint)
    # standard delete
    logger.info('standard delete')
    delete_counter = 0
    for secretfile in listdir(mountpoint):
        if 'secret' not in secretfile:
            # skip lost+found
            continue
        delete(secretfile, shred=False)
        delete_counter += 1
    logger.debug('deleted %d files', delete_counter)
    # check
    print('df for empty, dirty filesystem')
    print(run_external(['df', mountpoint])[1])
    # verify dirtiness
    unmount_filesystem(mountpoint)
    assert(verify_cleanliness(filename) == 11)
    mount_filesystem(filename, mountpoint)
    expected_free_space = free_space(mountpoint)
    # measure effectiveness of multiple wipes
    for i in range(1, 10):
        print('*' * 30)
        print('* pass %d *' % i)
        print('*' * 30)
        # remount
        if i > 1:
            mount_filesystem(filename, mountpoint)\
        # really wipe
        print('wiping %s' % mountpoint)
        for _w in wipe_path(mountpoint):
            pass
        # verify cleaning process freed all space it allocated
        actual_free_space = free_space(mountpoint)
        if not expected_free_space == actual_free_space:
            print('expecting %d free space but got %d' %
                  (expected_free_space, actual_free_space))
            import pdb
            pdb.set_trace()
        # unmount
        unmount_filesystem(mountpoint)
        # verify cleanliness
        cleanliness = verify_cleanliness(filename)
    assert(cleanliness < 2)
    # remove temporary
    delete(filename)
    delete(mountpoint)