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| author | Bénédikt Tran <10796600+picnixz@users.noreply.github.com> | 2025-01-03 14:51:22 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-01-03 14:51:22 (GMT) |
| commit | 4c14f03495724f2c52de2d34f1bfa35dd94757c0 (patch) | |
| tree | 857e94300c0f21e1d5505e8feab5bcc5b990d301 | |
| parent | 1c9b0204796ddeaee710646871a4404b4cda1f1b (diff) | |
| download | cpython-4c14f03495724f2c52de2d34f1bfa35dd94757c0.zip cpython-4c14f03495724f2c52de2d34f1bfa35dd94757c0.tar.gz cpython-4c14f03495724f2c52de2d34f1bfa35dd94757c0.tar.bz2 | |
gh-89083: improve UUIDv8 uniqueness tests (GH-128149)
improve UUIDv8 uniqueness tests
| -rwxr-xr-x | Lib/test/test_uuid.py | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/Lib/test/test_uuid.py b/Lib/test/test_uuid.py index 7bd26a8..8f40dd9 100755 --- a/Lib/test/test_uuid.py +++ b/Lib/test/test_uuid.py @@ -707,12 +707,16 @@ class BaseTestUUID: equal(u.int & 0x3fffffffffffffff, lo) def test_uuid8_uniqueness(self): - # Test that UUIDv8-generated values are unique - # (up to a negligible probability of failure). - u1 = self.uuid.uuid8() - u2 = self.uuid.uuid8() - self.assertNotEqual(u1.int, u2.int) - self.assertEqual(u1.version, u2.version) + # Test that UUIDv8-generated values are unique (up to a negligible + # probability of failure). There are 122 bits of entropy and assuming + # that the underlying mt-19937-based random generator is sufficiently + # good, it is unlikely to have a collision of two UUIDs. + N = 1000 + uuids = {self.uuid.uuid8() for _ in range(N)} + self.assertEqual(len(uuids), N) + + versions = {u.version for u in uuids} + self.assertSetEqual(versions, {8}) @support.requires_fork() def testIssue8621(self): |