circuitpython/tests/extmod/vfs_lfs.py

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# Test for VfsLittle using a RAM device
try:
import uos
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uos.VfsLfs1
uos.VfsLfs2
except (ImportError, AttributeError):
print("SKIP")
raise SystemExit
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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
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return len(self.data) // self.ERASE_BLOCK_SIZE
if op == 5: # block size
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return self.ERASE_BLOCK_SIZE
if op == 6: # erase block
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return 0
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def test(bdev, vfs_class):
print("test", vfs_class)
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# mkfs
vfs_class.mkfs(bdev)
# construction
vfs = vfs_class(bdev)
# statvfs
print(vfs.statvfs("/"))
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# open, write close
f = vfs.open("test", "w")
f.write("littlefs")
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f.close()
# statvfs after creating a file
print(vfs.statvfs("/"))
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# ilistdir
print(list(vfs.ilistdir()))
print(list(vfs.ilistdir("/")))
print(list(vfs.ilistdir(b"/")))
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# mkdir, rmdir
vfs.mkdir("testdir")
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print(list(vfs.ilistdir()))
print(sorted(list(vfs.ilistdir("testdir"))))
vfs.rmdir("testdir")
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print(list(vfs.ilistdir()))
vfs.mkdir("testdir")
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# stat a file
print(vfs.stat("test"))
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# stat a dir (size seems to vary on LFS2 so don't print that)
print(vfs.stat("testdir")[:6])
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# read
with vfs.open("test", "r") as f:
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print(f.read())
# create large file
with vfs.open("testbig", "w") as f:
data = "large012" * 32 * 16
print("data length:", len(data))
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for i in range(4):
print("write", i)
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f.write(data)
# stat after creating large file
print(vfs.statvfs("/"))
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# rename
vfs.rename("testbig", "testbig2")
print(sorted(list(vfs.ilistdir())))
vfs.chdir("testdir")
vfs.rename("/testbig2", "testbig2")
print(sorted(list(vfs.ilistdir())))
vfs.rename("testbig2", "/testbig2")
vfs.chdir("/")
print(sorted(list(vfs.ilistdir())))
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# remove
vfs.remove("testbig2")
print(sorted(list(vfs.ilistdir())))
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# getcwd, chdir
vfs.mkdir("/testdir2")
vfs.mkdir("/testdir/subdir")
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print(vfs.getcwd())
vfs.chdir("/testdir")
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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("/")
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print(vfs.getcwd())
vfs.chdir("testdir")
print(vfs.getcwd())
vfs.chdir("..")
print(vfs.getcwd())
vfs.chdir("testdir/subdir")
print(vfs.getcwd())
vfs.chdir("../..")
print(vfs.getcwd())
vfs.chdir("/./testdir2")
print(vfs.getcwd())
vfs.chdir("../testdir")
print(vfs.getcwd())
vfs.chdir("../..")
print(vfs.getcwd())
vfs.chdir(".//testdir")
print(vfs.getcwd())
vfs.chdir("subdir/./")
print(vfs.getcwd())
vfs.chdir("/")
print(vfs.getcwd())
vfs.rmdir("testdir/subdir")
vfs.rmdir("testdir")
vfs.rmdir("testdir2")
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bdev = RAMBlockDevice(30)
test(bdev, uos.VfsLfs1)
test(bdev, uos.VfsLfs2)