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# Test for VfsFat using a RAM device, mtime feature
try:
import time, os, vfs
time.time
time.sleep
vfs.VfsFat
except (ImportError, AttributeError):
print("SKIP")
raise SystemExit
class RAMBlockDevice:
ERASE_BLOCK_SIZE = 512
def __init__(self, blocks):
self.data = bytearray(blocks * self.ERASE_BLOCK_SIZE)
def readblocks(self, block, buf):
addr = block * self.ERASE_BLOCK_SIZE
for i in range(len(buf)):
buf[i] = self.data[addr + i]
def writeblocks(self, block, buf):
addr = block * self.ERASE_BLOCK_SIZE
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
def test(bdev, vfs_class):
print("test", vfs_class)
# Initial format of block device.
vfs_class.mkfs(bdev)
# construction
fs = vfs_class(bdev)
# Create an empty file, should have a timestamp.
current_time = int(time.time())
fs.open("test1", "wt").close()
# Wait 2 seconds so mtime will increase (FAT has 2 second resolution).
time.sleep(2)
# Create another empty file, should have a timestamp.
fs.open("test2", "wt").close()
# Stat the files and check mtime is non-zero.
stat1 = fs.stat("test1")
stat2 = fs.stat("test2")
print(stat1[8] != 0, stat2[8] != 0)
# Check that test1 has mtime which matches time.time() at point of creation.
# TODO this currently fails on the unix port because FAT stores timestamps
# in localtime and stat() is UTC based.
# print(current_time - 1 <= stat1[8] <= current_time + 1)
# Check that test1 is older than test2.
print(stat1[8] < stat2[8])
# Unmount.
fs.umount()
bdev = RAMBlockDevice(50)
test(bdev, vfs.VfsFat)
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