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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())
# create file in directory to make sure paths are relative
vfs.open("test2", "w").close()
print(vfs.stat("test2"))
print(vfs.stat("/testdir/test2"))
vfs.remove("test2")
# chdir back to root and remove testdir
vfs.chdir("/")
print(vfs.getcwd())
vfs.rmdir("testdir")
bdev = RAMBlockDevice(30)
test(bdev, uos.VfsLfs1)
test(bdev, uos.VfsLfs2)
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