Add a test for hashing of unaligned memory buffers (from issue #16427).
diff --git a/Lib/test/test_hash.py b/Lib/test/test_hash.py
index 0776779..d1ddc76 100644
--- a/Lib/test/test_hash.py
+++ b/Lib/test/test_hash.py
@@ -45,6 +45,16 @@
self.same_hash(int(1.23e300), float(1.23e300))
self.same_hash(float(0.5), complex(0.5, 0.0))
+ def test_unaligned_buffers(self):
+ # The hash function for bytes-like objects shouldn't have
+ # alignment-dependent results (example in issue #16427).
+ b = b"123456789abcdefghijklmnopqrstuvwxyz" * 128
+ for i in range(16):
+ for j in range(16):
+ aligned = b[i:128+j]
+ unaligned = memoryview(b)[i:128+j]
+ self.assertEqual(hash(aligned), hash(unaligned))
+
_default_hash = object.__hash__
class DefaultHash(object): pass