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bpo-22807: Expose platform UUID generation safety information. (#138)

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bpo-22807: Expose platform UUID generation safety information.
This commit is contained in:
Barry Warsaw 2017-02-18 15:45:49 -05:00 • committed by GitHub
parent ace5c0fdd9
commit 8c130d7f81
4 changed files with 111 additions and 7 deletions
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40
Lib/test/test_uuid.py
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@ -340,6 +340,46 @@ class TestUUID(unittest.TestCase):
equal(((u.clock_seq_hi_variant & 0x3f) << 8) |
u.clock_seq_low, 0x3fff)
@unittest.skipUnless(uuid._uuid_generate_time.restype is not None,
'requires uuid_generate_time_safe(3)')
@unittest.skipUnless(importable('ctypes'), 'requires ctypes')
def test_uuid1_safe(self):
u = uuid.uuid1()
# uuid_generate_time_safe() may return 0 or -1 but what it returns is
# dependent on the underlying platform support. At least it cannot be
# unknown (unless I suppose the platform is buggy).
self.assertNotEqual(u.is_safe, uuid.SafeUUID.unknown)
@unittest.skipUnless(importable('ctypes'), 'requires ctypes')
def test_uuid1_unknown(self):
# Even if the platform has uuid_generate_time_safe(), let's mock it to
# be uuid_generate_time() and ensure the safety is unknown.
with unittest.mock.patch.object(uuid._uuid_generate_time,
'restype', None):
u = uuid.uuid1()
self.assertEqual(u.is_safe, uuid.SafeUUID.unknown)
@unittest.skipUnless(importable('ctypes'), 'requires ctypes')
def test_uuid1_is_safe(self):
with unittest.mock.patch.object(uuid._uuid_generate_time,
'restype', lambda x: 0):
u = uuid.uuid1()
self.assertEqual(u.is_safe, uuid.SafeUUID.safe)
@unittest.skipUnless(importable('ctypes'), 'requires ctypes')
def test_uuid1_is_unsafe(self):
with unittest.mock.patch.object(uuid._uuid_generate_time,
'restype', lambda x: -1):
u = uuid.uuid1()
self.assertEqual(u.is_safe, uuid.SafeUUID.unsafe)
@unittest.skipUnless(importable('ctypes'), 'requires ctypes')
def test_uuid1_bogus_return_value(self):
with unittest.mock.patch.object(uuid._uuid_generate_time,
'restype', lambda x: 3):
u = uuid.uuid1()
self.assertEqual(u.is_safe, uuid.SafeUUID.unknown)
def test_uuid3(self):
equal = self.assertEqual