75 lines
1.9 KiB
Python
75 lines
1.9 KiB
Python
# Test for VfsFat using a RAM device, mtime feature
|
|
|
|
try:
|
|
import time, os
|
|
|
|
time.time
|
|
time.sleep
|
|
os.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
|
|
vfs = vfs_class(bdev)
|
|
|
|
# Create an empty file, should have a timestamp.
|
|
current_time = int(time.time())
|
|
vfs.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.
|
|
vfs.open("test2", "wt").close()
|
|
|
|
# Stat the files and check mtime is non-zero.
|
|
stat1 = vfs.stat("test1")
|
|
stat2 = vfs.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.
|
|
vfs.umount()
|
|
|
|
|
|
bdev = RAMBlockDevice(50)
|
|
test(bdev, os.VfsFat)
|