Add week 8 materials

materials/08-scaling/seminar/kv/proxy/test_strategies.py

@@ -0,0 +1,20 @@
+from .strategies import raid3_join, raid3_split
+
+
+def test_raid3_split():
+    value = 'Hello, world!' # len = 13
+    blocks = raid3_split(2, value) # 2 data blocks of 7 bytes, 1 parity block
+    assert len(blocks) == 2
+
+    assert blocks[0].index == 0
+    assert blocks[0].data == b'Hello, '
+    assert blocks[1].index == 1
+    assert blocks[1].data == b'world!\x00'
+
+
+def test_raid3_join_utf():
+    value = 'съешь ещё этих мягких французских булок'
+    blocks = raid3_split(4, value)
+    assert len(blocks) == 4
+    joined = raid3_join(blocks + [None])
+    assert joined == value