1try:
2    import uerrno
3    import uos
4except ImportError:
5    print("SKIP")
6    raise SystemExit
7
8try:
9    uos.VfsFat
10except AttributeError:
11    print("SKIP")
12    raise SystemExit
13
14
15class RAMFS:
16
17    SEC_SIZE = 512
18
19    def __init__(self, blocks):
20        self.data = bytearray(blocks * self.SEC_SIZE)
21
22    def readblocks(self, n, buf):
23        # print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
24        for i in range(len(buf)):
25            buf[i] = self.data[n * self.SEC_SIZE + i]
26
27    def writeblocks(self, n, buf):
28        # print("writeblocks(%s, %x)" % (n, id(buf)))
29        for i in range(len(buf)):
30            self.data[n * self.SEC_SIZE + i] = buf[i]
31
32    def ioctl(self, op, arg):
33        # print("ioctl(%d, %r)" % (op, arg))
34        if op == 4:  # MP_BLOCKDEV_IOCTL_BLOCK_COUNT
35            return len(self.data) // self.SEC_SIZE
36        if op == 5:  # MP_BLOCKDEV_IOCTL_BLOCK_SIZE
37            return self.SEC_SIZE
38
39
40try:
41    bdev = RAMFS(50)
42except MemoryError:
43    print("SKIP")
44    raise SystemExit
45
46uos.VfsFat.mkfs(bdev)
47
48print(b"FOO_FILETXT" not in bdev.data)
49print(b"hello!" not in bdev.data)
50
51vfs = uos.VfsFat(bdev)
52uos.mount(vfs, "/ramdisk")
53
54print("statvfs:", vfs.statvfs("/ramdisk"))
55print("getcwd:", vfs.getcwd())
56
57try:
58    vfs.stat("no_file.txt")
59except OSError as e:
60    print(e.args[0] == uerrno.ENOENT)
61
62with vfs.open("foo_file.txt", "w") as f:
63    f.write("hello!")
64print(list(vfs.ilistdir()))
65
66print("stat root:", vfs.stat("/")[:-3])  # timestamps differ across runs
67print("stat file:", vfs.stat("foo_file.txt")[:-3])  # timestamps differ across runs
68
69print(b"FOO_FILETXT" in bdev.data)
70print(b"hello!" in bdev.data)
71
72vfs.mkdir("foo_dir")
73vfs.chdir("foo_dir")
74print("getcwd:", vfs.getcwd())
75print(list(vfs.ilistdir()))
76
77with vfs.open("sub_file.txt", "w") as f:
78    f.write("subdir file")
79
80try:
81    vfs.chdir("sub_file.txt")
82except OSError as e:
83    print(e.args[0] == uerrno.ENOENT)
84
85vfs.chdir("..")
86print("getcwd:", vfs.getcwd())
87
88uos.umount(vfs)
89
90vfs = uos.VfsFat(bdev)
91print(list(vfs.ilistdir(b"")))
92
93# list a non-existent directory
94try:
95    vfs.ilistdir(b"no_exist")
96except OSError as e:
97    print("ENOENT:", e.args[0] == uerrno.ENOENT)
98