1try:
2    import uos
3except ImportError:
4    print("SKIP")
5    raise SystemExit
6
7try:
8    uos.VfsFat
9except AttributeError:
10    print("SKIP")
11    raise SystemExit
12
13
14class RAMFS:
15
16    SEC_SIZE = 512
17
18    def __init__(self, blocks):
19        self.data = bytearray(blocks * self.SEC_SIZE)
20
21    def readblocks(self, n, buf):
22        # print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
23        for i in range(len(buf)):
24            buf[i] = self.data[n * self.SEC_SIZE + i]
25
26    def writeblocks(self, n, buf):
27        # print("writeblocks(%s, %x)" % (n, id(buf)))
28        for i in range(len(buf)):
29            self.data[n * self.SEC_SIZE + i] = buf[i]
30
31    def ioctl(self, op, arg):
32        # print("ioctl(%d, %r)" % (op, arg))
33        if op == 4:  # MP_BLOCKDEV_IOCTL_BLOCK_COUNT
34            return len(self.data) // self.SEC_SIZE
35        if op == 5:  # MP_BLOCKDEV_IOCTL_BLOCK_SIZE
36            return self.SEC_SIZE
37
38
39try:
40    bdev = RAMFS(50)
41    bdev2 = RAMFS(50)
42except MemoryError:
43    print("SKIP")
44    raise SystemExit
45
46# first we umount any existing mount points the target may have
47try:
48    uos.umount("/")
49except OSError:
50    pass
51for path in uos.listdir("/"):
52    uos.umount("/" + path)
53
54uos.VfsFat.mkfs(bdev)
55uos.mount(bdev, "/")
56
57print(uos.getcwd())
58
59f = open("test.txt", "w")
60f.write("hello")
61f.close()
62
63print(uos.listdir())
64print(uos.listdir("/"))
65print(uos.stat("")[:-3])
66print(uos.stat("/")[:-3])
67print(uos.stat("test.txt")[:-3])
68print(uos.stat("/test.txt")[:-3])
69
70f = open("/test.txt")
71print(f.read())
72f.close()
73
74uos.rename("test.txt", "test2.txt")
75print(uos.listdir())
76uos.rename("test2.txt", "/test3.txt")
77print(uos.listdir())
78uos.rename("/test3.txt", "test4.txt")
79print(uos.listdir())
80uos.rename("/test4.txt", "/test5.txt")
81print(uos.listdir())
82
83uos.mkdir("dir")
84print(uos.listdir())
85uos.mkdir("/dir2")
86print(uos.listdir())
87uos.mkdir("dir/subdir")
88print(uos.listdir("dir"))
89for exist in ("", "/", "dir", "/dir", "dir/subdir"):
90    try:
91        uos.mkdir(exist)
92    except OSError as er:
93        print("mkdir OSError", er.args[0] == 17)  # EEXIST
94
95uos.chdir("/")
96print(uos.stat("test5.txt")[:-3])
97
98uos.VfsFat.mkfs(bdev2)
99uos.mount(bdev2, "/sys")
100print(uos.listdir())
101print(uos.listdir("sys"))
102print(uos.listdir("/sys"))
103
104uos.rmdir("dir2")
105uos.remove("test5.txt")
106print(uos.listdir())
107
108uos.umount("/")
109print(uos.getcwd())
110print(uos.listdir())
111print(uos.listdir("sys"))
112
113# test importing a file from a mounted FS
114import usys
115
116usys.path.clear()
117usys.path.append("/sys")
118with open("sys/test_module.py", "w") as f:
119    f.write('print("test_module!")')
120import test_module
121