138 lines
3.1 KiB
Python
138 lines
3.1 KiB
Python
try:
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import uerrno
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import uos
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except ImportError:
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print("SKIP")
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raise SystemExit
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try:
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uos.VfsFat
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except AttributeError:
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print("SKIP")
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raise SystemExit
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class RAMFS:
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SEC_SIZE = 512
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def __init__(self, blocks):
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self.data = bytearray(blocks * self.SEC_SIZE)
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def readblocks(self, n, buf):
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#print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
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for i in range(len(buf)):
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buf[i] = self.data[n * self.SEC_SIZE + i]
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def writeblocks(self, n, buf):
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#print("writeblocks(%s, %x)" % (n, id(buf)))
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for i in range(len(buf)):
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self.data[n * self.SEC_SIZE + i] = buf[i]
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def ioctl(self, op, arg):
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#print("ioctl(%d, %r)" % (op, arg))
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if op == 4: # MP_BLOCKDEV_IOCTL_BLOCK_COUNT
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return len(self.data) // self.SEC_SIZE
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if op == 5: # MP_BLOCKDEV_IOCTL_BLOCK_SIZE
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return self.SEC_SIZE
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try:
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bdev = RAMFS(50)
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except MemoryError:
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print("SKIP")
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raise SystemExit
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uos.VfsFat.mkfs(bdev)
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vfs = uos.VfsFat(bdev)
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uos.mount(vfs, '/ramdisk')
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uos.chdir('/ramdisk')
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# file IO
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f = open("foo_file.txt", "w")
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print(str(f)[:17], str(f)[-1:])
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f.write("hello!")
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f.flush()
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f.close()
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f.close() # allowed
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try:
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f.write("world!")
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except OSError as e:
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print(e.args[0] == uerrno.EINVAL)
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try:
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f.read()
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except OSError as e:
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print(e.args[0] == uerrno.EINVAL)
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try:
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f.flush()
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except OSError as e:
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print(e.args[0] == uerrno.EINVAL)
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try:
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open("foo_file.txt", "x")
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except OSError as e:
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print(e.args[0] == uerrno.EEXIST)
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with open("foo_file.txt", "a") as f:
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f.write("world!")
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with open("foo_file.txt") as f2:
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print(f2.read())
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print(f2.tell())
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f2.seek(0, 0) # SEEK_SET
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print(f2.read(1))
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f2.seek(0, 1) # SEEK_CUR
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print(f2.read(1))
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f2.seek(2, 1) # SEEK_CUR
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print(f2.read(1))
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f2.seek(-2, 2) # SEEK_END
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print(f2.read(1))
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# using constructor of FileIO type to open a file
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# no longer working with new VFS sub-system
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#FileIO = type(f)
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#with FileIO("/ramdisk/foo_file.txt") as f:
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# print(f.read())
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# dirs
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vfs.mkdir("foo_dir")
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try:
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vfs.rmdir("foo_file.txt")
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except OSError as e:
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print(e.args[0] == 20) # uerrno.ENOTDIR
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vfs.remove("foo_file.txt")
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print(list(vfs.ilistdir()))
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# Here we test that opening a file with the heap locked fails correctly. This
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# is a special case because file objects use a finaliser and allocating with a
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# finaliser is a different path to normal allocation. It would be better to
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# test this in the core tests but there are no core objects that use finaliser.
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import micropython
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micropython.heap_lock()
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try:
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vfs.open('x', 'r')
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except MemoryError:
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print('MemoryError')
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micropython.heap_unlock()
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# Here we test that the finaliser is actually called during a garbage collection.
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import gc
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N = 4
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for i in range(N):
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n = 'x%d' % i
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f = vfs.open(n, 'w')
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f.write(n)
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f = None # release f without closing
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[0, 1, 2, 3] # use up Python stack so f is really gone
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gc.collect() # should finalise all N files by closing them
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for i in range(N):
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with vfs.open('x%d' % i, 'r') as f:
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print(f.read())
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