103 lines
2.2 KiB
Python
103 lines
2.2 KiB
Python
# Test for VfsLittle using a RAM device, with mount/umount
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try:
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import uos
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uos.VfsLfs1
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uos.VfsLfs2
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except (ImportError, AttributeError):
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print("SKIP")
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raise SystemExit
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class RAMBlockDevice:
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ERASE_BLOCK_SIZE = 1024
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def __init__(self, blocks):
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self.data = bytearray(blocks * self.ERASE_BLOCK_SIZE)
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def readblocks(self, block, buf, off):
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addr = block * self.ERASE_BLOCK_SIZE + off
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for i in range(len(buf)):
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buf[i] = self.data[addr + i]
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def writeblocks(self, block, buf, off):
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addr = block * self.ERASE_BLOCK_SIZE + off
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for i in range(len(buf)):
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self.data[addr + i] = buf[i]
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def ioctl(self, op, arg):
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if op == 4: # block count
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return len(self.data) // self.ERASE_BLOCK_SIZE
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if op == 5: # block size
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return self.ERASE_BLOCK_SIZE
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if op == 6: # erase block
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return 0
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def test(bdev, vfs_class):
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print("test", vfs_class)
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# mkfs
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vfs_class.mkfs(bdev)
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# construction
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vfs = vfs_class(bdev)
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# mount
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uos.mount(vfs, "/lfs")
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# import
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with open("/lfs/lfsmod.py", "w") as f:
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f.write('print("hello from lfs")\n')
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import lfsmod
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# import package
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uos.mkdir("/lfs/lfspkg")
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with open("/lfs/lfspkg/__init__.py", "w") as f:
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f.write('print("package")\n')
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import lfspkg
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# chdir and import module from current directory (needs "" in sys.path)
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uos.mkdir("/lfs/subdir")
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uos.chdir("/lfs/subdir")
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uos.rename("/lfs/lfsmod.py", "/lfs/subdir/lfsmod2.py")
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import lfsmod2
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# umount
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uos.umount("/lfs")
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# mount read-only
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vfs = vfs_class(bdev)
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uos.mount(vfs, "/lfs", readonly=True)
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# test reading works
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with open("/lfs/subdir/lfsmod2.py") as f:
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print("lfsmod2.py:", f.read())
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# test writing fails
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try:
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open("/lfs/test_write", "w")
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except OSError as er:
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print(repr(er))
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# umount
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uos.umount("/lfs")
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# clear imported modules
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usys.modules.clear()
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bdev = RAMBlockDevice(30)
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# initialise path
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import usys
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usys.path.clear()
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usys.path.append("/lfs")
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usys.path.append("")
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# run tests
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test(bdev, uos.VfsLfs1)
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test(bdev, uos.VfsLfs2)
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