diff options
Diffstat (limited to 'Lib/test/test_hash.py')
| -rw-r--r-- | Lib/test/test_hash.py | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/Lib/test/test_hash.py b/Lib/test/test_hash.py index c0dd34dc7ff..d1ddc769847 100644 --- a/Lib/test/test_hash.py +++ b/Lib/test/test_hash.py @@ -45,6 +45,16 @@ class HashEqualityTestCase(unittest.TestCase): 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 @@ -113,8 +123,7 @@ class DefaultIterSeq(object): return self.seq[index] class HashBuiltinsTestCase(unittest.TestCase): - hashes_to_check = [range(10), - enumerate(range(10)), + hashes_to_check = [enumerate(range(10)), iter(DefaultIterSeq()), iter(lambda: 0, 0), ] @@ -160,8 +169,8 @@ class StringlikeHashRandomizationTests(HashRandomizationTests): else: known_hash_of_obj = -1600925533 - # Randomization is disabled by default: - self.assertEqual(self.get_hash(self.repr_), known_hash_of_obj) + # Randomization is enabled by default: + self.assertNotEqual(self.get_hash(self.repr_), known_hash_of_obj) # It can also be disabled by setting the seed to 0: self.assertEqual(self.get_hash(self.repr_, seed=0), known_hash_of_obj) @@ -193,6 +202,12 @@ class BytesHashRandomizationTests(StringlikeHashRandomizationTests): def test_empty_string(self): self.assertEqual(hash(b""), 0) +class MemoryviewHashRandomizationTests(StringlikeHashRandomizationTests): + repr_ = "memoryview(b'abc')" + + def test_empty_string(self): + self.assertEqual(hash(memoryview(b"")), 0) + class DatetimeTests(HashRandomizationTests): def get_hash_command(self, repr_): return 'import datetime; print(hash(%s))' % repr_ @@ -213,6 +228,7 @@ def test_main(): HashBuiltinsTestCase, StrHashRandomizationTests, BytesHashRandomizationTests, + MemoryviewHashRandomizationTests, DatetimeDateTests, DatetimeDatetimeTests, DatetimeTimeTests) |