micropython: add micropython component

components/language/micropython/tests/extmod/vfs_lfs_error.py

@@ -0,0 +1,121 @@
+# Test for VfsLittle using a RAM device, testing error handling
+
+try:
+    import uos
+
+    uos.VfsLfs1
+    uos.VfsLfs2
+except (ImportError, AttributeError):
+    print("SKIP")
+    raise SystemExit
+
+
+class RAMBlockDevice:
+    ERASE_BLOCK_SIZE = 1024
+
+    def __init__(self, blocks):
+        self.data = bytearray(blocks * self.ERASE_BLOCK_SIZE)
+
+    def readblocks(self, block, buf, off):
+        addr = block * self.ERASE_BLOCK_SIZE + off
+        for i in range(len(buf)):
+            buf[i] = self.data[addr + i]
+
+    def writeblocks(self, block, buf, off):
+        addr = block * self.ERASE_BLOCK_SIZE + off
+        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
+        if op == 6:  # erase block
+            return 0
+
+
+def test(bdev, vfs_class):
+    print("test", vfs_class)
+
+    # mkfs with too-small block device
+    try:
+        vfs_class.mkfs(RAMBlockDevice(1))
+    except OSError:
+        print("mkfs OSError")
+
+    # mount with invalid filesystem
+    try:
+        vfs_class(bdev)
+    except OSError:
+        print("mount OSError")
+
+    # set up for following tests
+    vfs_class.mkfs(bdev)
+    vfs = vfs_class(bdev)
+    with vfs.open("testfile", "w") as f:
+        f.write("test")
+    vfs.mkdir("testdir")
+
+    # ilistdir
+    try:
+        vfs.ilistdir("noexist")
+    except OSError:
+        print("ilistdir OSError")
+
+    # remove
+    try:
+        vfs.remove("noexist")
+    except OSError:
+        print("remove OSError")
+
+    # rmdir
+    try:
+        vfs.rmdir("noexist")
+    except OSError:
+        print("rmdir OSError")
+
+    # rename
+    try:
+        vfs.rename("noexist", "somethingelse")
+    except OSError:
+        print("rename OSError")
+
+    # mkdir
+    try:
+        vfs.mkdir("testdir")
+    except OSError:
+        print("mkdir OSError")
+
+    # chdir to nonexistent
+    try:
+        vfs.chdir("noexist")
+    except OSError:
+        print("chdir OSError")
+    print(vfs.getcwd())  # check still at root
+
+    # chdir to file
+    try:
+        vfs.chdir("testfile")
+    except OSError:
+        print("chdir OSError")
+    print(vfs.getcwd())  # check still at root
+
+    # stat
+    try:
+        vfs.stat("noexist")
+    except OSError:
+        print("stat OSError")
+
+    # error during seek
+    with vfs.open("testfile", "r") as f:
+        f.seek(1 << 30)  # SEEK_SET
+        try:
+            f.seek(1 << 30, 1)  # SEEK_CUR
+        except OSError:
+            print("seek OSError")
+
+
+bdev = RAMBlockDevice(30)
+test(bdev, uos.VfsLfs1)
+test(bdev, uos.VfsLfs2)