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# Test for VfsLittle using a RAM device, testing error handling
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 with too-small block device
try:
vfs_class.mkfs(RAMBlockDevice(1))
except OSError:
print('mkfs OSError')
# mount with invalid filesystem
try:
vfs_class(bdev)
except OSError:
print('mount OSError')
# set up for following tests
vfs_class.mkfs(bdev)
vfs = vfs_class(bdev)
with vfs.open('testfile', 'w') as f:
f.write('test')
vfs.mkdir('testdir')
# ilistdir
try:
vfs.ilistdir('noexist')
except OSError:
print('ilistdir OSError')
# remove
try:
vfs.remove('noexist')
except OSError:
print('remove OSError')
# rmdir
try:
vfs.rmdir('noexist')
except OSError:
print('rmdir OSError')
# rename
try:
vfs.rename('noexist', 'somethingelse')
except OSError:
print('rename OSError')
# mkdir
try:
vfs.mkdir('testdir')
except OSError:
print('mkdir OSError')
# chdir to nonexistent
try:
vfs.chdir('noexist')
except OSError:
print('chdir OSError')
print(vfs.getcwd()) # check still at root
# chdir to file
try:
vfs.chdir('testfile')
except OSError:
print('chdir OSError')
print(vfs.getcwd()) # check still at root
# stat
try:
vfs.stat('noexist')
except OSError:
print('stat OSError')
# error during seek
with vfs.open('testfile', 'r') as f:
f.seek(1 << 30) # SEEK_SET
try:
f.seek(1 << 30, 1) # SEEK_CUR
except OSError:
print('seek OSError')
bdev = RAMBlockDevice(30)
test(bdev, uos.VfsLfs1)
test(bdev, uos.VfsLfs2)
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