micropython: add micropython component

components/language/micropython/tests/extmod/vfs_fat_fileio2.py

@@ -0,0 +1,115 @@
+try:
+    import uerrno
+    import uos
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+try:
+    uos.VfsFat
+except AttributeError:
+    print("SKIP")
+    raise SystemExit
+
+
+class RAMFS:
+
+    SEC_SIZE = 512
+
+    def __init__(self, blocks):
+        self.data = bytearray(blocks * self.SEC_SIZE)
+
+    def readblocks(self, n, buf):
+        # print("readblocks(%s, %x(%d))" % (n, id(buf), len(buf)))
+        for i in range(len(buf)):
+            buf[i] = self.data[n * self.SEC_SIZE + i]
+
+    def writeblocks(self, n, buf):
+        # print("writeblocks(%s, %x)" % (n, id(buf)))
+        for i in range(len(buf)):
+            self.data[n * self.SEC_SIZE + i] = buf[i]
+
+    def ioctl(self, op, arg):
+        # print("ioctl(%d, %r)" % (op, arg))
+        if op == 4:  # MP_BLOCKDEV_IOCTL_BLOCK_COUNT
+            return len(self.data) // self.SEC_SIZE
+        if op == 5:  # MP_BLOCKDEV_IOCTL_BLOCK_SIZE
+            return self.SEC_SIZE
+
+
+try:
+    bdev = RAMFS(50)
+except MemoryError:
+    print("SKIP")
+    raise SystemExit
+
+uos.VfsFat.mkfs(bdev)
+vfs = uos.VfsFat(bdev)
+uos.mount(vfs, "/ramdisk")
+uos.chdir("/ramdisk")
+
+try:
+    vfs.mkdir("foo_dir")
+except OSError as e:
+    print(e.errno == uerrno.EEXIST)
+
+try:
+    vfs.remove("foo_dir")
+except OSError as e:
+    print(e.errno == uerrno.EISDIR)
+
+try:
+    vfs.remove("no_file.txt")
+except OSError as e:
+    print(e.errno == uerrno.ENOENT)
+
+try:
+    vfs.rename("foo_dir", "/null/file")
+except OSError as e:
+    print(e.errno == uerrno.ENOENT)
+
+# file in dir
+with open("foo_dir/file-in-dir.txt", "w+t") as f:
+    f.write("data in file")
+
+with open("foo_dir/file-in-dir.txt", "r+b") as f:
+    print(f.read())
+
+with open("foo_dir/sub_file.txt", "w") as f:
+    f.write("subdir file")
+
+# directory not empty
+try:
+    vfs.rmdir("foo_dir")
+except OSError as e:
+    print(e.errno == uerrno.EACCES)
+
+# trim full path
+vfs.rename("foo_dir/file-in-dir.txt", "foo_dir/file.txt")
+print(list(vfs.ilistdir("foo_dir")))
+
+vfs.rename("foo_dir/file.txt", "moved-to-root.txt")
+print(list(vfs.ilistdir()))
+
+# check that renaming to existing file will overwrite it
+with open("temp", "w") as f:
+    f.write("new text")
+vfs.rename("temp", "moved-to-root.txt")
+print(list(vfs.ilistdir()))
+with open("moved-to-root.txt") as f:
+    print(f.read())
+
+# valid removes
+vfs.remove("foo_dir/sub_file.txt")
+vfs.rmdir("foo_dir")
+print(list(vfs.ilistdir()))
+
+# disk full
+try:
+    bsize = vfs.statvfs("/ramdisk")[0]
+    free = vfs.statvfs("/ramdisk")[2] + 1
+    f = open("large_file.txt", "wb")
+    f.write(bytearray(bsize * free))
+except OSError as e:
+    print("ENOSPC:", e.errno == 28)  # uerrno.ENOSPC
+f.close()