rename module ecc->framing

tests/test_framing.py

@@ -0,0 +1,32 @@
+from amodem import framing
+import random
+import itertools
+import reedsolo
+
+
+def concat(chunks):
+    return bytearray(itertools.chain.from_iterable(chunks))
+
+
+def test_random():
+    r = random.Random(0)
+    x = bytearray(r.randrange(0, 256) for i in range(64 * 1024))
+    y = framing.encode(x)
+    x_ = concat(framing.decode(y))
+    assert x_ == x
+
+
+def test_errors():
+    data = bytearray(range(244))
+    blocks = list(framing.encode(data))
+    assert len(blocks) == 2
+    for i in range(framing.DEFAULT_NSYM // 2):
+        blocks[0][i] = blocks[0][i] ^ 0xFF
+
+    i = framing.DEFAULT_NSYM // 2
+    try:
+        blocks[0][i] = blocks[0][i] ^ 0xFF
+        concat(framing.decode(blocks))
+        assert False
+    except reedsolo.ReedSolomonError as e:
+        assert e.args == ('Too many errors to correct',)