1 files changed, 113 insertions, 0 deletions
diff --git a/tests/extmod/vfs_fat_fileio1.py b/tests/extmod/vfs_fat_fileio1.py
new file mode 100644
index 0000000000..322f6831ed
--- /dev/null
+++ b/tests/extmod/vfs_fat_fileio1.py
@@ -0,0 +1,113 @@
+import sys
+import uerrno
+try:
+    import uos_vfs as uos
+    open = uos.vfs_open
+except ImportError:
+    import uos
+try:
+    uos.VfsFat
+except AttributeError:
+    print("SKIP")
+    sys.exit()
+
+
+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:  # BP_IOCTL_SEC_COUNT
+            return len(self.data) // self.SEC_SIZE
+        if op == 5:  # BP_IOCTL_SEC_SIZE
+            return self.SEC_SIZE
+
+
+try:
+    bdev = RAMFS(50)
+except MemoryError:
+    print("SKIP")
+    sys.exit()
+
+uos.VfsFat.mkfs(bdev)
+vfs = uos.VfsFat(bdev)
+uos.mount(vfs, '/ramdisk')
+uos.chdir('/ramdisk')
+
+# file IO
+f = open("foo_file.txt", "w")
+print(str(f)[:17], str(f)[-1:])
+f.write("hello!")
+f.flush()
+f.close()
+f.close() # allowed
+try:
+    f.write("world!")
+except OSError as e:
+    print(e.args[0] == uerrno.EINVAL)
+
+try:
+    f.read()
+except OSError as e:
+    print(e.args[0] == uerrno.EINVAL)
+
+try:
+    f.flush()
+except OSError as e:
+    print(e.args[0] == uerrno.EINVAL)
+
+try:
+    open("foo_file.txt", "x")
+except OSError as e:
+    print(e.args[0] == uerrno.EEXIST)
+
+with open("foo_file.txt", "a") as f:
+    f.write("world!")
+
+with open("foo_file.txt") as f2:
+    print(f2.read())
+    print(f2.tell())
+
+    f2.seek(0, 0) # SEEK_SET
+    print(f2.read(1))
+
+    f2.seek(0, 1) # SEEK_CUR
+    print(f2.read(1))
+    try:
+        f2.seek(1, 1) # SEEK_END
+    except OSError as e:
+        print(e.args[0] == uerrno.EOPNOTSUPP)
+
+    f2.seek(-2, 2) # SEEK_END
+    print(f2.read(1))
+
+# using constructor of FileIO type to open a file
+# no longer working with new VFS sub-system
+#FileIO = type(f)
+#with FileIO("/ramdisk/foo_file.txt") as f:
+#    print(f.read())
+
+# dirs
+vfs.mkdir("foo_dir")
+
+try:
+    vfs.rmdir("foo_file.txt")
+except OSError as e:
+    print(e.args[0] == 20) # uerrno.ENOTDIR
+
+vfs.remove("foo_file.txt")
+print(vfs.listdir())