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# Test for VfsLittle using a RAM device
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)
# statvfs
print(vfs.statvfs('/'))
# open, write close
f = vfs.open('test', 'w')
f.write('littlefs')
f.close()
# statvfs after creating a file
print(vfs.statvfs('/'))
# ilistdir
print(list(vfs.ilistdir()))
print(list(vfs.ilistdir('/')))
print(list(vfs.ilistdir(b'/')))
# mkdir, rmdir
vfs.mkdir('testdir')
print(list(vfs.ilistdir()))
print(list(vfs.ilistdir('testdir')))
vfs.rmdir('testdir')
print(list(vfs.ilistdir()))
vfs.mkdir('testdir')
# stat a file
print(vfs.stat('test'))
# stat a dir (size seems to vary on LFS2 so don't print that)
print(vfs.stat('testdir')[:6])
# read
with vfs.open('test', 'r') as f:
print(f.read())
# create large file
with vfs.open('testbig', 'w') as f:
data = 'large012' * 32 * 16
print('data length:', len(data))
for i in range(4):
print('write', i)
f.write(data)
# stat after creating large file
print(vfs.statvfs('/'))
# rename
vfs.rename('testbig', 'testbig2')
print(list(vfs.ilistdir()))
# remove
vfs.remove('testbig2')
print(list(vfs.ilistdir()))
# getcwd, chdir
print(vfs.getcwd())
vfs.chdir('/testdir')
print(vfs.getcwd())
vfs.chdir('/')
print(vfs.getcwd())
vfs.rmdir('testdir')
bdev = RAMBlockDevice(30)
test(bdev, uos.VfsLfs1)
test(bdev, uos.VfsLfs2)
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