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# Test for VfsLittle using a RAM device, with mount/umount
try:
import uos
uos.VfsLfs1
uos.VfsLfs2
except (ImportError, AttributeError):
print("SKIP")
raise SystemExit
class RAMBlockDevice:
ERASE_BLOCK_SIZE = 1024
def __init__(self, blocks):
self.data = bytearray(blocks * self.ERASE_BLOCK_SIZE)
def readblocks(self, block, buf, off):
addr = block * self.ERASE_BLOCK_SIZE + off
for i in range(len(buf)):
buf[i] = self.data[addr + i]
def writeblocks(self, block, buf, off):
addr = block * self.ERASE_BLOCK_SIZE + off
for i in range(len(buf)):
self.data[addr + i] = buf[i]
def ioctl(self, op, arg):
if op == 4: # block count
return len(self.data) // self.ERASE_BLOCK_SIZE
if op == 5: # block size
return self.ERASE_BLOCK_SIZE
if op == 6: # erase block
return 0
def test(bdev, vfs_class):
print('test', vfs_class)
# mkfs
vfs_class.mkfs(bdev)
# construction
vfs = vfs_class(bdev)
# mount
uos.mount(vfs, '/lfs')
# import
with open('/lfs/lfsmod.py', 'w') as f:
f.write('print("hello from lfs")\n')
import lfsmod
# import package
uos.mkdir('/lfs/lfspkg')
with open('/lfs/lfspkg/__init__.py', 'w') as f:
f.write('print("package")\n')
import lfspkg
# umount
uos.umount('/lfs')
# clear imported modules
sys.modules.clear()
bdev = RAMBlockDevice(30)
# initialise path
import sys
sys.path.clear()
sys.path.append('/lfs')
# run tests
test(bdev, uos.VfsLfs1)
test(bdev, uos.VfsLfs2)
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